Cycloteuthids are mesopelagic squids of moderate size, the largest reaches about 60 cm ML, with a cosmopolitan distribution in tropical and subtropical waters (Nesis, 1982). In Cycloteuthis the mantle and fins are drawn-out into a slender tail. A tail is lacking in Discoteuthis and the large, oval (disc-like) combined fins extend virtually the full length of the mantle. Very little is known about the biology of any species in the family.
An oegopsid ...
- with triangular funnel locking-apparatus.
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