By species www.diverosa.com Rokus Groeneveld & Sanne Reijs  
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  family Euryleptidae
FMI-163 flatworm, Cycloporus sp.

Ascidiophilla alba

on ascidian Didemnum molle

Cebu, the Philippines 2007
house reef Magic Island (night dive)

FM2-229 Flatworm Cycloporus sp. on Didemnum molle

Ascidiophilla alba

on ascidian Didemnum molle

Cebu, the Philippines 2012
house reef Magic Island (night dive)

IB3-061_Ascidiophilla_alba_with_undetermined_amphipod

Ascidiophilla alba

with undetermined amphipod

Bali, Indonesia 2016
Tulamben, house reef Ocean view (nd.)

IB3-322_Ascidiophilla_alba

Ascidiophilla alba

?

Bali, Indonesia 2016
Tulamben, house reef Ocean view (nd.)

FRO-249_Ascidiophilla_alba_on_Didemnum_molle

Ascidiophilla alba

?

Romblon, the Philippines 2017
Dive site: Anchor bay

IRA-360_Cycloporus_sp_undetermined_flatworm

Cycloporus sp.

?

Raja ampat, Indonesia 2014
Dive site: house reef Sorido (night dive)

AWA-055_Maritigrella_fuscopunctatus_Dusky_spotted_flatworm

Maritigrella fuscopunctatus

Dusky spotted flatworm

Western Australia 2020
Dive site: Rockingham wreck trail

IH2-264_Maritigrella_virgulata

Maritigrella virgulata

?

Halmahera, Indonesia 2014
Dive site: Mangrove

IB3-180_Maritigrella_virgulata

Maritigrella virgulata

?

Bali, Indonesia 2016
Menjangan, Mimpi chanel (night dive)

FRO-311_Prostheceraeus_fuscolineatus

Prostheceraeus fuscolineatus

?

Romblon, the Philippines 2017
Dive site: Suwa

  IL3-251_family_Euryleptidae_undetermined_flatworm

family Euryleptidae

?

Lembeh, Indonesia 2008
Dive site: Teluk kembahu II (night dive)

IL4-046 unidentified flatworm, Eurylepta sp.

family Euryleptidae

?

Lembeh, Indonesia 2010
Dive site: Kapal indah

IL4-203 unidentified Euryleptid sp.

family Euryleptidae

?

Lembeh, Indonesia 2010
Dive site: Kapal indah

IL5-260 flatworm Euryleptid sp.

family Euryleptidae

?

Lembeh, Indonesia 2014
Dive site: Pulau abadir

IRA-271_family_Euryleptidae_undetermined_flatworm

family Euryleptidae

?

Raja ampat, Indonesia 2014
Dive site: Friwenbonda

IB3-066_family_Euryleptidae_undetermined_flatworm

family Euryleptidae

?

Bali, Indonesia 2016
Dive site: Seraya

FRO-091_family_Euryleptidae_undetermined_flatworm

family Euryleptidae

undetermined flatworm

Romblon, the Philippines 2017
Dive site: Bangug talisay

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  family Pseudocerotidae
IAM-322_Acanthozoon_alderi

Acanthozoon alderi

?

Ambon, Indonesia 2010
house reef Maluku divers (night dive)

FM2-235_Acanthozoon_alderi

Acanthozoon alderi

?

Cebu, the Philippines 2012
house reef Magic Island (night dive)

IH2-182_Acanthozoon_alderi

Acanthozoon alderi

?

Halmahera, Indonesia 2014
Dive site: Tanjung uli

IH2-179_Acanthozoon_alderi

Acanthozoon alderi

?

Halmahera, Indonesia 2014
Dive site: Pasir putih

FRO-440_Acanthozoon_alderi

Acanthozoon alderi

?

Romblon, the Philippines 2017
Dive site: Bon bon (night dive)

FMO-030_Nymphozoon_bayeri

Nymphozoon bayeri

?

Anda, the Philippines 2018
house reef Magic Oceans (night dive)

IHW-143_Nymphozoon_orsaki

Nymphozoon orsaki

Orsak Flatworm

Halmahera, Indonesia 2010
Dive site: Shark reef

FM2-007_Nymphozoon_orsaki

Nymphozoon orsaki

Orsak Flatworm

Cebu, the Philippines 2012
Dive site: Fish feeding

IRA-079_Nymphozoon_orsaki

Nymphozoon orsaki

Orsak Flatworm

Raja ampat, Indonesia 2014
Dive site: Otdima

IB3-210_probably_Phrikoceros_baibaiye

probably Phrikoceros baibaiye

?

Bali, Indonesia 2016
Dive site: Secret bay (night dive)

FN2-046_Phrikoceros_katoi

Phrikoceros katoi

?

Negros, the Philippines 2019
Dive site: Orica pier

IB3-378_Phrikoceros_lizardensis

Phrikoceros lizardensis

Olive faltworm

Bali, Indonesia 2016
Dive site: Seraya slope (night dive)

FN2-448_Phrikoceros_lizardensis

mayby Phrikoceros lizardensis

Olive flatworm

Negros, Philippines 2019
Dive site: Sahara (night dive)

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Slugs & Flatworms
IL3-305_probably_Pseudobiceros_apricus

probably Pseudobiceros apricus

?

Lembeh, Indonesia 2008
Dive site: Air prang (night dive)

MKA-33 Elegant flatworm, Pseudobiceros bedfordi

Pseudobiceros bedfordi

Elegant flatworm

Kapalai, Malaysia 2003
Dive site: Midreef

IGI-17 Elegant flatworm, Pseudobiceros bedfordi

Pseudobiceros bedfordi

swimming Elegant flatworm

Gili islands, Lombok, Indonesia 2009
Stingray, Gili Trawangan (night dive)

IHW-171 Elegant flatworm, Pseudobiceros bedfordi

Pseudobiceros bedfordi

Elegant flatworm

Halmahera, Indonesia 2010
house reef Weda resort (night dive)

FMO-051_Pseudobiceros_ferrugineus_Fuchsia_flatworm

Pseudobiceros ferrugineus

(half) Fuchsia flatworm

Anda, the Philippines 2018
Dive site: Bacong east

FMO-244_Pseudobiceros_ferrugineus_Fuchsia_flatworm

Pseudobiceros ferrugineus

Fuchsia flatworm

Philippines, Anda 2018
Dive site: Bacong west

FMO-199_Pseudobiceros_ferrugineus

Pseudobiceros ferrugineus

Fuchsia flatworm, juvenile

Philippines, Anda 2018
Dive site: Lamanok Island

IL3-249 Flowers' flatworm, Pseudobiceros flowersi

Pseudobiceros flowersi

Flower’s flatworm

Lembeh, Indonesia 2008
Dive site: Air prang (night dive)

IL4-201 Flowers' flatworm, Pseudobiceros flowersi

Pseudobiceros flowersi

Flower’s flatworm

Lembeh, Indonesia 2010
Dive site: Jarijari (night dive)

IL4-200 swimming Flowers' flatworm, Pseudobiceros flowersi

Pseudobiceros flowersi

swimming Flower’s flatworm

Lembeh, Indonesia 2010
Dive site: Jarijari (night dive)

2 Orsaki flatworm, MIL5-114 2 Flowers' flatworm, Pseudobiceros flowersi, on Robust sea squirt, Atriolum robustum

Pseudobiceros flowersi

feeding on Atriolum robustum

Lembeh, Indonesia 2014
Dive site: Jahir (night dive)

IL5-308 Flowers' flatworm, Pseudobiceros flowersi

Pseudobiceros flowersi

Flower’s flatworm

Lembeh, Indonesia 2014
Dive site: Jahir (night dive)

FN2-250_Pseudobiceros_flowersi_feeding_on_Atriolum_robustum

Pseudobiceros flowersi

feeding on Atriolum robustum

Negros, Philippines 2019
Dive site: Malatapay (night dive)

IMI-254_Pseudobiceros_fulgor

Pseudobiceros fulgor

?

Bangka, Indonesia 2017
house reef Mimpi Indah (night dive)

IL5-222 Glorious flatworm, Pseudobiceros gloriosus

Pseudobiceros gloriosus

Glorious flatworm

Lembeh, Indonesia 2014
Dive site: Kuda laut

FM2-225_Pseudobiceros_hancockanus

Pseudobiceros hancockanus

?

Cebu, the Philippines 2012
house reef Magic Island (night dive)

FN2-254_Pseudobiceros_hancockanus

Pseudobiceros hancockanus

?

Negros, Philippines 2019
Dive site: Malatapay (night dive)

FMI-230 Hidden pseudobiceros, Pseudobiceros kryptos 1

Pseudobiceros kryptos

?

Cebu, the Philippines 2007
house reef Magic Island (night dive)

FMI-231 Hidden pseudobiceros, Pseudobiceros kryptos 2

Pseudobiceros kryptos

?

Cebu, the Philippines 2007
house reef Magic Island (night dive)

FRO-287_Pseudobiceros_sharroni

Pseudobiceros sharroni

?

Romblon, the Philippines 2017
Dive site: Bangug 3 (night dive)

FMO-266_Pseudobiceros_sp_undetermined_flatworm

Pseudobiceros sp.

undetermined flatworm

Philippines, Anda 2018
Dive site: Secret place (night dive)

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Slugs & Flatworms
FPG-13 Racing Stripe Flatworm, Pseudoceros bifurcus

Pseudoceros bifurcus

Racing stripe flatworm

Puerto Galera, Philippines 2005
Dive site: Sinadigan

IBA-012 Racing stripe flatworm, Pseudoceros bifurcus

Pseudoceros bifurcus

Racing stripe flatworm

Bali, Indonesia 2009
Dive site: Menjangan, Pos I

IBA-138 Racing stripe flatworm, Pseudoceros bifurcus

Pseudoceros bifurcus

Racing stripe flatworm

Bali, Indonesia 2009
Dive site: Menjangan, Pos I

IH2-091 Racing stripe flatworm, Pseudoceros bifurcus

Pseudoceros bifurcus

Racing stripe flatworm

Halmahera, Indonesia 2014
Dive site: Pasir putih

IB3-155_Pseudoceros_bifurcus,_Racing_stripe_flatworm

Pseudoceros bifurcus

Racing stripe flatworm

Bali, Indonesia 2016
Dive site: Menjangan, Blue corner

IB3-178_Pseudoceros_bimarginatus

Pseudoceros bimarginatus

?

Bali, Indonesia 2016
Menjangan, Mimpi chanel (night dive)

IRA-124_Pseudoceros_concinnus_Elegant_striped_flatworm

Pseudoceros concinnus

Elegant striped flatworm

Raja ampat, Indonesia 2014
Dive site: The passage

FRO-289_Pseudoceros_cf_contrarius

Pseudoceros cf. contrarius

?

Romblon, the Philippines 2017
Dive site: Broken house

MKA-32 Thysanozoon nigropapillosum and Pseudoceros dimidiatus

Pseudoceros dimidiatus &

Thysanozoon nigropapillosum

Kapalai, Malaysia 2003
Dive site: Midreef

IH2-202 Divided flatworm or Tiger flatworm, Pseudoceros dimidiatus

Pseudoceros dimidiatus

Divided flatworm or Tiger flatworm

Halmahera, Indonesia 2014
Dive site: Elmo's reef

IB3-141_Pseudoceros_dimidiatus,_Divided_flatworm

Pseudoceros dimidiatus

Divided flatworm or Tiger flatworm

Bali, Indonesia 2016
Diver site: Menjangan, Eel garden

IL4-168_Pseudoceros_duplicinctus

Pseudoceros duplicinctus

?

Lembeh, Indonesia 2010
Dive site: Teluk kembahu II

IB3-364_Pseudoceros_duplicinctus

Pseudoceros duplicinctus

?

Bali, Indonesia 2016
Dive site: Seraya slope

FRO-171_Pseudoceros_duplicinctus

Pseudoceros duplicinctus

?

Romblon, the Philippines 2017
Dive site: Bon bon (night dive)

EMA-206_Pseudoceros_goslineri

Pseudoceros goslineri

?

Marsa alam, Egypt 2012
Dive site: house reef Oasis (night dive)

IRA-293_Pseudoceros_goslineri

Pseudoceros goslineri

?

Raja ampat, Indonesia 2014
Dive site: The passage

FNE-018 Pseudoceros laingensis

Pseudoceros laingensis

Purple-spotted yellow flatworm

Negros, the Philippines 2012
Dive site: Siquijor, Paliton (sanctuary)

IRA-031 Purple-spotted yellow flatworm, Pseudoceros laingensis

Pseudoceros laingensis

Purple-spotted yellow flatworm

Raja ampat, Indonesia 2014
Dive site: Mike's point

IRA-315 Purple-spotted yellow flatworm, Pseudoceros laingensis

Pseudoceros laingensis

Purple-spotted yellow flatworm

Raja ampat, Indonesia 2014
Dive site: Otdima

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Slugs & Flatworms
IRA-133 flatworm Pseudoceros lindae

Pseudoceros lindae

?

Raja ampat, Indonesia 2014
Dive site: house reef Sorido (night dive)

IB3-167_Pseudoceros_lindae,_Linda's_flatworm

Pseudoceros lindae

?

Bali, Indonesia 2016
Dive site: Menjangan, Blue corner

IMI-152_Pseudoceros_lindae

Pseudoceros lindae

?

Bangka, Indonesia 2017
Dive site: Batu Lihunu

ASA-092_Pseudoceros_lividus_Blue_flatworm

Pseudoceros lividus

Blue flatworm

South Australia 2018
Dive site: Edithburgh jetty

IB2-180_Pseudoceros_cf_meenae

Pseudoceros cf. meenae

?

Bali, Indonesia 2011
Dive site: Tulamben, Drop off

IL3-250 Pseudoceros paralaticlavus

Pseudoceros paralaticlavus

?

Lembeh, Indonesia 2008
Dive site: Tanduk rusa (night dive)

IL5-304 Goldrim flatworm, Pseudoceros paralaticlavus

Pseudoceros paralaticlavus

Goldrim flatworm

Lembeh, Indonesia 2014
Dive site: Jari Jari

IB3-321_Pseudoceros_rubronanus,_Red_dwarf_flatworm

Pseudoceros cf. rubronanus

Red dwarf flatworm

Bali, Indonesia 2016
house reef Ocean view (night dive)

FRO-274_Pseudoceros_rubronanus

Pseudoceros cf. rubronanus

Red dwarf flatworm

Romblon, the Philippines 2017
Dive site: Bonbon broken coconut

FM2-347_Pseudoceros_rubronanus

Pseudoceros cf. rubronanus

Red dwarf flatworm

Cebu, the Philippines 2012
Dive site: Banlot (night dive)

FNE-194 Sparky pseudoceros, Pseudoceros scintillatus

Pseudoceros scintillatus

Brilliant flatworm (or Sparky pseudoceros)

Negros, the Philippines 2012
Dive site: Apo island, Largahan

IL5-172 Brilliant flatworm, Pseudobiceros scintillatus

Pseudoceros scintillatus

Brilliant flatworm (or Sparky pseudoceros)

Lembeh, Indonesia 2014
Dive site: Jahir

FAN-460 Pseudoceros scintillatus, Brilliant flatworm

Pseudoceros scintillatus

Brilliant flatworm (or Sparky pseudoceros)

Anilao, the Philippines 2015
Dive site: Basura

FAN-284 Pseudoceros scintillatus, Brilliant flatworm

Pseudoceros scintillatus

Brilliant flatworm (or Sparky pseudoceros)

Anilao, the Philippines 2015
Dive site: Secret bay

FAN-416 Pseudoceros scintillatus, Brilliant flatworm 2

Pseudoceros scintillatus

Brilliant flatworm (or Sparky pseudoceros)

Anilao, the Philippines 2015
Dive site: Secret bay

FN2-247_Pseudoceros_scintillatus_Brilliant_flatworm

Pseudoceros scintillatus

Brilliant flatworm (or Sparky pseudoceros)

Negros, Philippines 2019
Dive site: Secret corner

FN2-303_Pseudoceros_scriptus

Pseudoceros scriptus

?

Negros, Philippines 2019
Dive site: Orica pier

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Slugs & Flatworms
IRA-128 undetermined flatworm, Pseudoceros sp.

Pseudoceros sp.

?

Raja ampat, Indonesia 2014
Dive site: The passage

IRA-300 undetermined flatworm, Pseudoceros sp.

Pseudoceros sp.

?

Raja ampat, Indonesia 2014
Dive site: The passage

FMO-062_Pseudoceros_sp

Pseudoceros sp.

?

Anda, the Philippines 2018
Dive site: Bacong west

  EHA-26 Yellowspot flatworm, Thysanozoon nigropapillosum

Thysanozoon nigropapillosum

Yellowspot flatworm

Hamata, Egypt 2007
Dive site: Shaab Hamam

Swimming Yellowspot flatworm, Thysanozoon nigropapillosum

Thysanozoon nigropapillosum

Yellowspot flatworm

Hamata, Egypt 2007
Dive site: Habili Claudia

IHW-227 Yellowspot flatworm, Thysanozoon nigropapillosum

Thysanozoon nigropapillosum

Yellowspot flatworm

Halmahera, Indonesia 2010
Dive site: New jetty (night dive)

FAN-185_Thysanozoon_sp_undetermined_flatworm

Thysanozoon sp.

undetermined flatworm

Anilao, the Philippines 2015
Dive site: Secret garden

FRO-121_family_Pseudocerotidae_undetermined_cryptic_flatworm

family Pseudocerotidae

Acanthozoon sp. or Thysanozoon sp.

Romblon, the Philippines 2017
Dive site: Bonbon talisay

IBA-162_family_Pseudocerotidae_undetermined_flatworm

family Pseudocerotidae

undetermined flatworm

Bali, Indonesia 2009
Dive site: Secret bay

ASA-134_family_Pseudocerotidae_undetermined_flatworm

family Pseudocerotidae

?

Australia, Victoria 2018
Dive site: Blairgowrie pier (night dive)

  Prosthiostomidae   Acotylean flatworms
AWA-128_family_Prosthiostomidae_undetermined_flatworm

family Prosthiostomidae

undetermined flatworm

Western Australia 2020
Dive site: Bunker bay

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Slugs & Flatworms
AVI-208_Echinoplana_celerrima

Echinoplana celerrima

?

Australia, Victoria 2018
Dive site: Flinders pier

FRO-099_Planocera_pellucida

Planocera pellucida

?

Romblon, the Philippines 2017
Dive site: Agnay desert (night dive)

IB3-073_undetermined_Acotylean_flatworm

Acotylean flatworm

undetermined

Bali, Indonesia 2016
Dive site: Seraya point

  Acoel flatworms
Acoel Flatworms, cf. Amphiscolos sp.

cf. Amphiscolos sp.

Acoel flatworms

Halmahera, Indonesia 2010
Dive site: Shark reef

IHW-017 Acoel Flatworm, cf. Amphiscolos sp

cf. Amphiscolos sp.

Acoel flatworm

Halmahera, Indonesia 2010
Dive site: Shark reef

IH2-272 Acoel Flatworms, cf. Amphiscolos sp.

cf. Amphiscolos sp.

Acoel flatworm

Halmahera, Indonesia 2014
Dive site: Mangrove

  IHW-039 Acoel flatworms, Waminoa sp.

Waminoa sp.

Acoel flatworms

Halmahera, Indonesia 2010
Dive site: N 00.28.192 / E 127.58.668

FMI-175 Acoel flatworms, Waminoa sp. on Bubble coral or Grape coral, Plerogyra sinuosa

Waminoa sp.

Acoel flatworms

Cebu, the Philippines 2007
Dive site: house reef Magic Island

IB2-242 Acoel flatworms, Waminoa sp. on soft coral

Waminoa sp.

Acoel flatworms

Bali, Indonesia 2011
Dive site: Amed, Drop off

FM2-125 Acoel flatworms, Waminoa sp.

Waminoa sp.

Acoel flatworms

Cebu, the Philippines 2012
Dive site: Arigay

FM2-315 Acoel flatworms, Waminoa sp. on Bubble coral or Grape coral, Plerogyra sinuosa

Waminoa sp.

Acoel flatworms

Cebu, the Philippines 2012
Dive site: house reef Magic Island

IH2-170 Acoel flatworms, Waminoa sp.

Waminoa sp.

Acoel flatworms

Halmahera, Indonesia 2014
Dive site: Tidore

IMI-163_Acoel_flatworms_Waminoa_sp_on_Plerogyra_sinuosa_Bubble_coral

Waminoa sp.

Acoel flatworms

Bangka, Indonesia 2017
Dive site: Areng kambing 1

IMI-145_Acoel_flatworms_Waminoa_sp_on_Plerogyra_sinuosa_Bubble_coral

Waminoa sp.

Acoel flatworms

Bangka, Indonesia 2017
Dive site: Tanjung husi 3

FMO-163_Waminoa_sp_Acoel_flatworms

Waminoa sp.

Acoel flatworms

Philippines, Anda 2018
Dive site: Birhen point

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Slugs & Flatworms
IL4-099 Thick-skinned sea star, Echinaster callosus with Periclimenes soror and Acoel flatworms

undetermined Acoel flatworms

on Echinaster callosus

Lembeh, Indonesia 2010
Dive site: Pulau serena