Spotted sand bass
A protogynous hermaphrodite sea bass of the eastern Pacific.
The spotted sand bass (Paralabrax maculatofasciatus) is a marine ray-finned fish belonging to the sea bass subfamily Serraninae, which also includes groupers and anthias. Its range is the central eastern Pacific Ocean. This fish has an elongated, compressed body, with a standard length about three to three and a third times its depth. It has a pointed head and a large mouth, and the edges of its preopercle are finely serrated. The dorsal fin contains 10 spines—the third being notably elongated—and 13 to 14 soft rays, while the anal fin has 3 spines and 7 soft rays. The caudal fin is either rounded or slightly concave. Its body is tan, covered with black, brown, and orange spots that merge into dark vertical bars along the rear of the underside. A dark line runs from the eye to the gill cover, and six or seven dark lines appear on the sides. The anal, caudal, and soft dorsal fins are densely spotted. The maximum recorded total length is 67 centimeters (26 inches), with a maximum weight of 6.0 kilograms (13.2 pounds).
This species inhabits shallow, warm waters in bays, harbors, and sheltered coastal areas, preferring structured habitats like eelgrass, surfgrass, or rocks. It is carnivorous, feeding mainly on crustaceans, bivalves, and small fish. Spawning occurs from May to September, with females releasing eggs into the water column; the pelagic larvae settle after about a month. The spotted sand bass is a protogynous hermaphrodite and a secretive daytime hunter. Its range extends from southern California—rare north of Santa Monica Bay but found as far north as Monterey Bay—south to the southern tip of Baja California, Mexico, though historically it reached Mazatlán.
First formally described as *Serranus maculatofasciatus* in 1868 by Austrian ichthyologist Franz Steindachner, with the type locality given as Mazatlán, Sinaloa, Mexico, it is one of the most derived species in the genus *Paralabrax* and the sister taxon to the barred sand bass (*P. nebulifer*). The spotted sand bass is an important target for recreational game fisheries in bays and harbors and is also taken as bycatch in the Gulf of California.
Quick Facts
- Taxon
- Paralabrax maculatofasciatus
Facts from the source article.
Lore & Background
The spotted sand bass has an elongate, compressed body with a standard length 3.0-3.3 times its depth. It has a pointed head with a large mouth, and the edges of the preopercle are finely serrated. The dorsal fin has 10 spines, the third spine greatly elongated, and 13-14 soft rays; the anal fin has 3 spines and 7 soft rays. The caudal fin is rounded or concave. The body is tan with many black, brown, and orange spots that meld into dark vertical bars along the posterior ventral surface. A dark line runs from the eye to the operculum, and there are 6 or 7 dark lines on the flanks. The anal, caudal, and soft part of the dorsal fins are densely spotted.
It is found in southern California, as far north as Monterey Bay but rare north of Santa Monica Bay, south to the southern tip of Baja California in Mexico, though historically it was found as far south as Mazatlan. It inhabits shallow, warm-water areas in bays, harbors, and sheltered coastal environments, preferring structured habitats such as eelgrass, surfgrass, or rocks. It is carnivorous, feeding mainly on crustaceans, bivalves, and small fishes. The spawning season is from May until September; females release eggs into the water column, and pelagic larvae live for about a month before settling. This species is a protogynous hermaphrodite and hunts during the day.
First formally described as Serranus maculatofasciatus in 1868 by Austrian ichthyologist Franz Steindachner, with the type locality given as Mazatlan in Sinaloa, Mexico. It is one of the most derived species in the genus Paralabrax and is the sister taxon of the barred sand bass (P. nebulifer).
Reader's Guide
The spotted sand bass is an important quarry species for recreational game fisheries, where it is caught in bays and harbors. It is also taken as bycatch in the Gulf of California. Its significance lies in its role as a target for anglers in shallow, warm-water coastal environments, particularly in southern California and Baja California. The species' preference for structured habitats like eelgrass and rocks makes it a common catch in these areas. Its protogynous hermaphroditism and seasonal spawning from May to September are key biological traits that influence its population dynamics. The maximum published total length of 67 cm and weight of 6.0 kg indicate its size potential for sport fishing. As a derived species within Paralabrax, it shares a close evolutionary relationship with the barred sand bass. The historical range extending to Mazatlan suggests a broader past distribution, though current records show it is rare north of Santa Monica Bay. Its secretive, diurnal hunting behavior and carnivorous diet of crustaceans, bivalves, and small fishes define its ecological niche.
Did You Know?
- Its third dorsal fin spine is greatly elongated.
- It was first formally described in 1868 by Franz Steindachner.
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