What are some seven-letter fish?

22 of the 120 fish in Icillion have exactly 7 letters, for example Catfish, Sardine and Herring.

Which seven-letter fish start with H?

H is the most common first letter here, with 4 names, such as Haddock, Hagfish, Halibut and Herring.

Nature · lists

These are the seven-letter fish in Icillion: 22 names, from “Anchovy” to “Whiting”.

22 of the 120 fish have exactly 7 letters (18%).
Most start with H (4), G (3) and S (3).
Only names of one word are counted, and only their letters: spaces, hyphens and apostrophes are not.

What are some seven-letter fish?: 22 of the 120 fish in Icillion have exactly 7 letters, for example Catfish, Sardine and Herring.
Which seven-letter fish start with H?: H is the most common first letter here, with 4 names, such as Haddock, Hagfish, Halibut and Herring.

How deep does your knowledge go?

Seven prompts a day, twenty seconds each. Obvious answers float on the tip of the iceberg; rare ones sink all the way to the trench.