Jellynose fish

Jellynose fishes
Deep-water ateleopid fish (Ijimaia plicatellus)
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Clade: Neoteleostei
Order: Ateleopodiformes
Family: Ateleopodidae
Bonaparte, 1850
Type species
Ateleopus japonicus
Bleeker, 1853
Genera

The jellynose fishes or tadpole fishes are the small order Ateleopodiformes. This group of ray-finned fish is monotypic, containing a single family Ateleopodidae. It has about a dozen species in four genera, but these enigmatic fishes are in need of taxonomic revision. 

The scientific name means "Ateleopus-shaped", from Ateleopus (the type genus) + the standard fish order suffix "-formes". It ultimately derives from Ancient Greek atelēs (ἀτελής, "imperfect") + pous (πούς, "foot") + Latin forma ("external form"), the Greek part in reference to the reduced pectoral and ventral fins of the jellynoses.

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