Cunner

The cunner (Tautogolabrus adspersus) is a small, hardy wrasse found in cold coastal waters of the western Atlantic, from Newfoundland and the Gulf of St. Lawrence south to New Jersey. It is closely related to the larger tautog and shares its preference for rocky, structured habitat such as reefs, wrecks, and pilings. Cunner are notable for their tolerance of cold temperatures and their ability to enter a dormant, torpid state on the seafloor during the coldest winter months, a behavior unusual among fish. Highly variable in color, they are common and frequently encountered by divers throughout their range, and are not considered at conservation risk.

Cunner are recognized by their small size, variable coloration, and typical wrasse body shape.

• Body: elongated, moderately compressed, with a pointed snout and thick lips
• Coloration: highly variable, ranging from mottled brown and olive-green to reddish or bluish tones, often matching surrounding habitat
• Fins: single long, continuous dorsal fin running most of the body length
• Teeth: prominent, forward-projecting front teeth used for picking at prey
• Size: typically 15-25 cm, occasionally to about 38 cm

Cunner are distinguished from the similar tautog by their smaller size, more slender build, and typically brighter or more varied coloration rather than tautog's darker, mottled appearance.

Cunner inhabit cold, coastal waters of the western Atlantic from Newfoundland and the Gulf of St. Lawrence south to New Jersey, occasionally further south. They favor structured, vegetated habitats such as rocky reefs, kelp beds, eelgrass, pilings, and wrecks, typically in shallow to moderate depths of a few meters down to around 30 meters. The species tolerates a wide temperature range but becomes inactive and seeks shelter in crevices during the coldest winter months. Cunner are strongly site-attached, often remaining within a limited home range around suitable rocky or vegetated structure throughout the year.

Cunner are curious, opportunistic feeders that pick at a wide variety of small invertebrates, including barnacles, mussels, worms, and crustaceans, using their strong forward teeth. They are generally solitary or loosely associated with others of similar size around shared structure, showing territorial behavior toward favored shelter sites. During winter, cunner become torpid, seeking refuge in rock crevices and reducing activity dramatically until water temperatures rise again in spring. Spawning occurs in warmer months, with eggs released into open water. As active daytime foragers around reefs and pilings, cunner play a role in controlling encrusting invertebrate populations in their coastal habitat.