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Fish Isopods
Cymothoidae
The Cymothoidae are a family of isopods in the suborder Cymothoida found in both marine and freshwater environments. Cymoithoids are ectoparasites, usually of fish, and they include the bizarre "tongue-biter" (Cymothoa exigua), which attaches to a fish's tongue, causing it to atrophy, and replaces the tongue with its own body. Ceratothoa oestroides is one of the most devastating ectoparasites in Mediterranean aquaculture. Around 40 genera and more than 380 species of cymothoid are recognised. Species of the Cymothoidae are generally found in warmer waters and rarely in the cool
and cold climates.
28 branches of this family, most-observed first

Fish Lice
genusAnilocra

Nerocila
genusNerocila

Elthusa
genusElthusa

Tongue Lice
genusCymothoa

Buccal Lice
genusCeratothoa

Livoneca
genusLivoneca

Creniola
genusCreniola

Renocila
genusRenocila

Olencira
genusOlencira

Norileca
genusNorileca

Braga
genusBraga

Mothocya
genusMothocya

Ichthyoxenos
genusIchthyoxenos

Ourozeuktes
genusOurozeuktes

Riggia
genusRiggia

Glossobius
genusGlossobius

Cinusa
genusCinusa

Vanamea
genusVanamea

Lobothorax
genusLobothorax
Pseudirona
genusPseudirona
Aegathoa
genusAegathoa
Joryma
genusJoryma
Catoessa
genusCatoessa
Smenispa
genusSmenispa
Agarna
genusAgarna

Artystone
genusArtystone
Anphira
genusAnphira

Philostomella
genusPhilostomella
Where it lives
Recorded sightings
—
geo-referenced records in GBIF, from museums, herbaria and field observers.
Drag the globe to turn it. Dots are where records exist, not a range map; darker means more records.
In the stacks
Searching the stacks…
Every page naming Cymothoidae in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 49937.