Rockfish

Rockfish comprise a large family of approximately 102 to 109 different species worldwide, which come in various shapes, sizes, and colors. About 33 species of these fish are found in the Gulf of Alaska.

These fish can get huge, and some of them can even grow up to three feet. They come in a variety of colors like red, yellow, orange, black, and dark green. Some of these fish have poisonous spines on their dorsal fins.

These fish can weigh anywhere from around 1.7 lbs (770 grams) to over 20 lbs (9 kg), depending on the species. These fish are known to have long lives. Some of them are known to live for about 120 years.

Incredible Rockfish Facts

• Huge size: These fish can get up to three feet long. Some of these fish have poisonous spines on their dorsal fins.
• Viviparous: These fish give birth to thousands of tiny larvae after internal fertilization.
• Groups or solitary: Some of these fish are known to exist in groups that are known as schools. However, some of them like to remain solitary.
• Motionless: These fish are excellent at pretending that they are motionless mid-water.
• A substantial number of species: There are approximately 102 to 109 different species of rockfish worldwide. About 33 of these rockfish species are found in the Gulf of Alaska alone.

Classification and Scientific Name

These fish belong to the kingdom Animalia and phylum Chordata. These fish come from the class Actinopterygii and order Scorpaeniformes. These fish also belong to a genus named Sebastes.

The word Sebastes comes from an ancient Greek word – σεβαστός, or sebastós. It translates to mean “venerable” or “august.” Venerable means that something is owed respect for its age, character, or the wisdom it holds, which suits the rockfish well. Considering that the fish can live over 200 years, this adjective describes it nicely.

Species

There are about 100 different species of rockfish. All of them come in different shapes, sizes, and colors. Out of the 100 different types, some types include rosefish, yelloweye rockfish, and deep-water redfish.

Though these fish are genetically similar, they can look very different between each species. Understanding why they are different can make a big difference in fishing, cooking, and spotting them.

Some common rockfish species include:

• Deacon rockfish (Sebastes diaconus): The Deacon Rockfish has a blue tinge to the body with a pink fin, dark coloration, and a protruding jaw, though it is commonly confused with the Blue Rockfish. It commonly resides in rocky reefs, spreading itself from the northern offshore regions of California to southern British Columbia.
• Vermillion rockfish (Sebastes miniatus): With a rough and scaly underside along the jaw, the Vermillion rockfish likes to go after octopus as their food, as well as squid. Even with their small 20-inch body, the females can hold over 280,000 eggs.
• Copper rockfish (Sebastes caurinus): This orange and white speckled fish likes to journey from shallow depths of just 33 feet to deep dives of 600 feet. It has a long gestation period, lasting ten months, before it gives birth to live young.
• Tiger rockfish (Sebastes nigrocinctus): The bright orange and deep red bars along the body give this rockfish the tiger-like appearance that it is named for. It tends to be aggressive towards other breeds, and it is found in many regions, from the central California coast to just off Kodiak Island.

Appearance

These fish are known to have large scales, and they have spines on their heads. They also have gill covers and fins. Some of them have poisonous spines on their dorsal fins, which may have spots along them to differentiate between the species.

Much like the coloring, the size of the rockfish will vary significantly with the species. In general, an average adult can grow up to 8 to 40 inches from the tip of their tail to the curl of their lips. These fish weigh from 1.7 lbs (770 grams) to 11.7 lbs (5.3 kg). The dorsal and anal fins vary from species to species but have incredibly sharp angles.

There are about thirty-two species of these fish in the Gulf of Alaska. These fish come in a variety of colors, like black, green, orange, and red. Some of these fish also have stripes and/or splotches on the body, helping anyone to get a better idea of which species they may have caught.

Distribution, Population, and Habitat

These fish are deep-water fish and are usually found between 31 and 66 degrees. They are known to be found in the North Pacific, the Bering Sea, and the Aleutian Islands. Besides that, these fish are also found in California and San Diego. In the Gulf of Alaska, there are about thirty-two rockfish species.

In 1997, there were more than 400 million rockfish around the world. While rockfish as a group are not extinct, several species are listed as threatened or endangered. There are several types of rockfish. Some of them include rosefish, yelloweye rockfish, and deep-water redfish.

Predators and Prey

Like almost all other living creatures, these fish are an important part of the ecosystem and are preyed upon by several predators. Though they are aggressive with crustaceans, they also experience their fair share of predators.

What Does the Rockfish Eat?

To get enough nutrition in their body, rockfish seek out crabs, shrimp, greenlings, and Pacific herring in their diet, depending on what is available within their habitat. Amphipods, which look much like shrimp, are another useful source of nutrients for rockfish and are predominantly found in freshwater.

What Eats Rockfish?

The common predators of the rockfishes include harbor seals, salmonids, and lingcod. The China rockfish is hunted by much bigger animals, like dolphins and sharks, since they are an excellent source of protein.

Reproduction and Lifespan

Most rockfish in the genus Sebastes are viviparous, which means that the reproduction in these fish occurs internally. The gestation period lasts up to several months, after which the fish give birth to thousands of babies or larvae — most of which are eaten by other fish as the water currents across the seas and oceans carry them away.

These fish live long lives, and some have even lived to 200 years.

Fishing and Cooking

Rockfish can very well be fished and cooked. They are known to have a mildly sweet flavor and a nutty crunch. Their flesh is moderately firm and has medium-sized flakes.

The most classic way to prepare this fish is with fresh herbs and lemon, much like you would prepare salmon. However, being a saltwater fish, some people compare the flavor to that of striped bass or ocean perch.