Green Blenny

Green Blenny, Labrisomus striatus

The Green Blenny, Labrisomus striatus, whose common Spanish name is trambollo listado, is a species in the Labrisomid Blenny or Labrisomidae Family, known collectively as trambollos in Mexico. Globally, there are twenty-seven species in the genus Labrisomus, of which thirteen are found in Mexican waters, nine in the Atlantic and four in the Pacific.

The Green Blennies have shortened elongated bodies with a uniform depth throughout that tapers gradually at the rear into the tail. The sexes have different colors. Females are light brown with a series of thin dark stripes between the scale rows; they have large red-brown spots on their sides and a pale colored head with a pair of brown bars that run obliquely down and back from the eyes. Males are greenish with a similar pattern of bars as females. Their head is broad with a blunt snout, large eyes, a branched cirrus over each eye, and several heavily branched cirri on each side of the nape. Their mouth is large, opens at the front, and is slightly oblique; it is equipped with one row of small teeth on the upper and lower jaws. Their anal fin has two spines and 17 rays; their caudal fin is square; and their dorsal fin has 18 spines and 10 rays with a deep notch in between. They are covered with small scales.

The Green Blennies are a shallow water coastal species found within weed-covered rocky structure at depths up to 30 feet. They reach a maximum length of 14.0 cm (5.5 inches). They are diurnal highly territorial predators that feed mostly on benthic crustaceans including small crabs. Reproduction is oviparous with females depositing eggs in protected areas. Very little is known about their behavioral patterns.

The Green Blennies are found in the lower two-thirds of the Sea of Cortez and from Mazatlán south along the west coast of the mainland; they are absent from the west coast of Baja.

The Green Blenny is mostly likely confused with the Largemouth Blenny, Labrisomus xanti (large mouth; numerous white spots on lower part of head and body).

Due to their small size and rarity, the Green Blennies are of limited interest to most.

Green Blenny, Labrisomus striatus, female. Fish collected from a tidal pool at Km 17, El Tule, Baja California Sur, February 2007. Length: 2.5 cm (1.0 inch). Identification reconfirmed by H.-C. Lin, Scripps Institution of Oceanography, La Jolla, CA.

Green Blenny, Labrisomus striatus, male. Fish collected from a tidal pool at Km 17, El Tule, Baja California Sur, April 2009. Length: 9.0 cm (3.5 inches). Identification courtesy of H.J. Walker, Jr., Scripps Institution of Oceanography, La Jolla, CA.