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Anilocra chromis Parasitic Chromis fish louse

Anilocra chromis is commonly referred to as Parasitic Chromis fish louse. Difficulty in the aquarium: Not suitable for aquarium keeping. Toxicity: Toxic hazard unknown.


Profilbild Urheber Dan Schofield, UK

Foto: Karibische Niederlande

/ 27,09,2021 / CC BY
Courtesy of the author Dan Schofield, UK . Please visit www.inaturalist.org for more information.

Uploaded by AndiV.

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lexID:
18698 
AphiaID:
257441 
Scientific:
Anilocra chromis 
German:
Parasitäre Chromis-Fischassel 
English:
Parasitic Chromis Fish Louse 
Category:
Other Crustaceans 
Family tree:
Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Cymothoidae (Family) > Anilocra (Genus) > chromis (Species) 
Initial determination:
Bunkley-Williams & Williams, 1981 
Occurrence:
Puerto Rico, The Bahamas, the Caribbean, Virgin Islands, U.S., West-Atlantic Ocean 
Marine Zone:
Subtidal, sublittoral, infralittoral, deep zone of the oceans from the lower limit of the intertidal zone (intertidal) to the shelf edge at about 200 m water depth. neritic. 
Sea depth:
7 - 25 Meter 
Habitats:
Marine / Salt Water 
Size:
0" - 0.79" (0,4cm - 2,8cm) 
Temperature:
80.6 °F - 29,5 °F (27°C - 29,5°C) 
Food:
Blood, bodily fluids, skin tissue, Parasitic 
Difficulty:
Not suitable for aquarium keeping 
Offspring:
None 
Toxicity:
Toxic hazard unknown 
CITES:
Not evaluated 
Red List:
Not evaluated (NE) 
Related species at
Catalog of Life:
 
Author:
Publisher:
Meerwasser-Lexikon.de
Created:
Last edit:
2026-10-25 15:54:28 

Info

Anilocra chromis is a parasitic isopod that specifically infests the reef wrasse Chromis multilineata (Guichenot, 1853) in the eastern Caribbean as an ectoparasite, biting onto its host and draining it of blood and other bodily fluids, often leading to the host’s death.
Juvenile and adult isopods have been observed on this reef wrasse.

In the area around the Bahamas and in parts of the western Caribbean, Azurina cyanea is infested by the parasite Anilocra chromis.

It is unclear why these two fish host species are infested in these two geographically separate regions, just as it is unclear why other reef snapper species are spared by the isopod.

We would like to extend our sincere thanks to Dan Schofield of the UK and Luke Padon of the U.S. for the first two photos.

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