Sea ravens are a family, the Hemitripteridae, of scorpaeniform fish. They are bottom-dwelling fish that feed on small invertebrates, found in the northwest Atlantic and north Pacific Oceans. They are covered in small spines (modified scales).

Hemitripteridae. Retrieved November, 05 2021, from en.wikipedia.org/wiki/Sea_raven.

The sailfin sculpin (Nautichthys oculofasciatus, lit. "eye-banded sailor fish") is a species of scorpaeniform marine fish in the sea raven family Hemitripteridae, native to the eastern Pacific Ocean from St. Lawrence Island, Alaska to San Miguel Island off southern California. Named for its elongated, sail-like first dorsal fin, the sailfin sculpin is a popular subject of public aquaria; it is of no interest to commercial fishery.

Nautichthys oculofasciatus. Retrieved November, 05 2021, from en.wikipedia.org/wiki/Sailfin_sculpin.