Black sea bass

What it is

This marine ray-finned fish belongs to the sea bass subfamily within the Serranidae family, which also contains groupers. Adults typically reach thirty centimetres in length, though they can grow to sixty-six centimetres and weigh over four kilograms. The body is oblong and compressed sideways. A large mouth contains bands of teeth on the jaws and a triangular patch on the roof. The dorsal fin features ten spines with deeply notched membranes between them. Colouration ranges from smoky grey to blue-black on the back, fading to a lighter underside. Pale spots on each scale create longitudinal stripes along the flanks.

Where it lives

Its distribution covers the western Atlantic Ocean. The range extends from Nova Scotia southward along the North American eastern seaboard. It reaches as far south as the Florida Keys and enters the Gulf of Mexico. In the Gulf, its western limit lies just west of the Mississippi Delta near Louisiana. These fish inhabit rocky substrates and areas near rock jetties in shallow waters. They are also recorded in deeper offshore zones down to one hundred and thirty metres. Juveniles prefer protected estuarine waters, often hiding around man-made structures, wrecks, or shell beds.

How it lives

This predatory species feeds on a broad variety of prey including crabs, shrimps, barnacles, and worms. It also consumes tunicates, small fish, and bivalves. Larger fish hunt the black sea bass, with known predators including monkfish, spotted hake, and summer flounder. Striped bass, bluefish, and weakfish also prey on them, as do little skates, spiny dogfish, and certain sharks. The fish spends most of its time near the bottom, aggregating around rocks or wrecks. It often rests in a head-down or head-up position. The dorsal fin remains folded but spreads out as an aggressive signal to others.

Breeding and life cycle

The species is a protogynous hermaphrodite, meaning most individuals start life as females and later change to males. This shift likely occurs when large females detect a shortage of males in their spawning group. Sexual maturity arrives between one and three years of age. Spawning takes place from January through July. Smaller females release around thirty thousand eggs, while larger ones may produce half a million. The pelagic eggs measure about one millimetre in diameter and hatch after seventy-five hours in sixteen degree Celsius water. Larvae remain pelagic until reaching thirteen millimetres, then settle into estuarine habitats.

Fish and people

Fishermen value this species for both commercial and recreational purposes. Its lean, white flesh has a firm texture that breaks into small flakes with a delicate flavour. Due to their modest size, they are often cooked whole. Catch methods include otter trawls, hook and line gear, and pots or traps. Although they show promise for aquaculture with high growth rates in sheltered environments, they are not yet farmed commercially. Management involves catch limits, permits, and closed seasons. Two distinct populations are managed separately north and south of Cape Hatteras by various US fisheries councils.

Relatives and look-alikes

It is the type species for the genus Centropristis. The generic name combines Greek words for sting and saw. It was first described by Carolus Linnaeus in 1758 as Labrus striatus. Georges Cuvier later established the genus using a synonym of Linnaeus’s original classification. It belongs to the same family as groupers and anthias.

Questions people ask about Black sea bass

Good reading and sources

• Black sea bass on WikipediaEncyclopedia
• More photos on Wikimedia CommonsPhotos
• Wikidata recordOpen data