- An oval-shaped fish with a small mouth.
- Dark blue, olive brown, or grayish black coloration on back, becoming lighter on belly.
- Lighter gray blotches on sides.
- No spots on dorsal (back) fin.
- Bottom fin straight, not rounded, which distinguishes it from the black rockfish.
- Adults up to 21 inches in length.
- The Bering Sea to Punta Baja, Baja California, Mexico.
- Live on rocky bottoms, rocky shores, kelp beds, even shipwrecks.
- Found at depths of 0-300 feet, but most commonly 0-100 feet.
- Main spawning season is November-March.
- Fertilization is internal.
- Rockfish hatch their eggs internally and give birth to live young, which are quite small and helpless.
- A female blue rockfish can contain 500,000 eggs at a time!
- Salps (gelatinous plankton), jellyfish, shrimp, crustaceans, small fishes, and algae.
- Juveniles are eaten by lingcod, salmonids (salmon and trout), and other larger fish.
- Adults are eaten by marine mammals like harbor seals.
- Blue rockfish are often found in large schools.
- They can live to be quite old fish, up to 44 years old!
- This species was redescribed by Frable et al., 2015. Ben Frable is the collections manager of the Marine Vertebrate Collection at Scripps Institution of Oceanography.
Sources: California Department of Fish and Wildlife; Encyclopedia of Puget Sound; California Finfish and Shellfish Identification Book
Photo: Howard Hall