Striped Sea Robin

The Striped Sea Robin (Prionotus evolans) is a bottom-dwelling marine fish in the family Triglidae, found along the northwestern Atlantic coast from Nova Scotia to Florida, with greatest abundance in the mid-Atlantic and southern New England. Like other sea robins, it has an armored, bony head and wing-like pectoral fins with separate lower rays used for sensing the seabed. It is a seasonal migrant, moving into shallower coastal and estuarine waters during warmer months and retreating to deeper offshore water in winter. The species is common and not of conservation concern, and it is a familiar catch for recreational anglers fishing sandy nearshore waters.

Key identification features of the Striped Sea Robin:

• Elongated body, brownish above with distinct dark diagonal bars or stripes along the sides
• Large, bony, armored head with ridges and small spines
• Broad, wing-like pectoral fins with a dark blue-green spotted pattern, often extending past the anal fin when spread
• Three separate, finger-like free rays beneath each pectoral fin
• Two dorsal fins, the first spiny
• Typical adult length of 30-45 cm

The diagonal side stripes and larger size distinguish it from the smaller northern sea robin, which lacks the same bold barring.

Striped Sea Robin occurs along the continental shelf of the northwestern Atlantic from the Canadian Maritimes to Florida, most commonly from Cape Cod to the Chesapeake Bay region. It favors sandy or muddy bottoms in coastal and estuarine waters from just below the shoreline to around 70 m depth. In warmer months it moves into shallow bays, sounds, and nearshore surf zones, retreating to deeper, warmer offshore water as temperatures drop in autumn and winter. It tolerates moderate salinity fluctuations and is often found near sandy inlets and channel edges.

Striped Sea Robin is a bottom-oriented forager that uses the free rays of its pectoral fins to probe sand and mud for buried crustaceans, worms, and small fish, which it captures with a quick strike of its protrusible mouth. It is not a schooling species, typically moving and feeding alone or in loose aggregations over productive bottom areas. Like other sea robins, it can produce grunting or drumming sounds using muscles adjacent to the swim bladder, likely used in communication or defense. Spawning occurs in warmer coastal waters during summer, with pelagic eggs that drift before larvae settle to demersal life. Seasonal inshore-offshore migration tracks water temperature.