As a noun finfish is
any fish, but especially fish other than flatfish.
shelldish
Not English
Shelldish has no English definition. It may be misspelled.
English words similar to 'shelldish':
sluttish
finfish
English
Noun
(en-noun)
Any fish, but especially fish other than flatfish
Usage notes
*Used industrially to denote ordinary fish, rather than flatfish, eels and other seafood.