Malacoctenus mexicanus is a species of fish belonging to the family Labrisomidae, commonly known as the “Mexican blenny.” This small fish is a fascinating example of the biodiversity found in the marine environments of the eastern Pacific Ocean.
Description & Characteristics
Malacoctenus mexicanus is a relatively small fish, with a maximum recorded size of 6.5 cm. Its body is elongated and compressed, exhibiting a slender profile. The coloration of this species is quite distinctive, with a pale brown or grayish base color adorned with numerous dark brown or black blotches and spots. These markings can vary in intensity and distribution depending on the individual and its environment. The head of Malacoctenus mexicanus is relatively large, bearing large eyes and a prominent snout. It has a single dorsal fin that extends the length of its back, featuring both spinous and soft rays. The pelvic fins are small and located close to the throat, while the anal fin is located posterior to the dorsal fin.
Habitat and Occurrence
Malacoctenus mexicanus is a demersal species, meaning it primarily inhabits the bottom of the seafloor. Its preferred habitat is rocky reefs and crevices, offering shelter and protection from predators. This species is known to occur in the eastern Pacific Ocean, ranging from Baja California, Mexico, to Panama. Its distribution typically encompasses the intertidal zone and shallow subtidal areas, making it a prevalent presence in these aquatic ecosystems. Malacoctenus mexicanus is often found in the infralittoral zone, which is the marine zone extending from the lowest point of the low tide to the edge of the continental shelf.
Taxonomy
Malacoctenus mexicanus belongs to the Class: Teleostei, Order: Blenniiformes, and Family: Labrisomidae. This family, also known as the “blenny-like fishes,” includes a diverse group of small, often colorful fish that are commonly found in coastal waters worldwide. The Order Blenniiformes is characterized by its members’ elongated bodies, relatively small mouths, and the presence of a single dorsal fin, which typically features both spinous and soft rays.
Feeding
Malacoctenus mexicanus is a carnivorous species, feeding primarily on small invertebrates such as crustaceans, worms, and mollusks. Its diet is likely influenced by the availability of prey in its specific habitat. These fish are known to be opportunistic feeders, taking advantage of any edible organisms they encounter in their surroundings.
Image References