lungs,
Gadidae
The Sole. Fish in the family Soleidae.
the gross part
There is currently no name for people who do not eat fish, but eat meat.
Any fish from the family Trachipteridae in the order Lampriformes
pieces of krill or pieces of fish
dory
the muskellunge.
Exocoetidae
The catfish are all classified as siluriformes (according to wikispecies).
Guts, fins, tail and eyes.
Depends on the fish and the habitat. I believe that they can be secondary consumers and up. I dont think they can be primary consumers, because these are mostly autotrophic, and fish (according to what I know) are heterotrophic.