The Chestnut Blenny, Cirripectes castaneus, has a series of dark bars along the sides. Blennies are a diverse group of fish, most of which belong to the families Blenniidae and Chaenopsidae. The most popular aquarium specimens belong to the genera Ecsenius, Salarias, and Meiacanthus. Most Blennies reach a size of three inches in an aquarium, while the largest of the group can reach over seven inches in length in the wild. Blennies are closely related to Gobies, and often are recognized by the cirri or eyelashes over their eyes and nostrils. These fish are usually bottom dwellers, and are most commonly associated with coral reefs or rocky areas. Blennies are found in tropical and temperate waters throughout the world, and most aquarium specimens come from the Indo-Pacific region. Most Blennies spend their time on the reef grazing on microalgae and small crustaceans. Blennies in an aquarium are somewhat territorial in nature, and only one species per tank is recommended for most of the fish in this group. The exception to this rule is fish from the genus Meiacanthus, which can be kept together in a small group. With all Blennies, extensive rockwork and a good growth of microalgae are necessary to successfully maintain them in an aquarium. Most Blennies are ideally suited for life in the home aquarium. They are relatively hardy, and adjust well to an aquarium. Maximum Size: The Chestnut Blenny Grows up to 3.9 inches. Habitat: Cirripectes castaneus (Chestnut eyelash blenny) is a temperate fish and can die from a rapid move to a tropical aquarium. Chestnut eyelash blenny likes to dig around and will appreciate a bottom with mixed size rubble and gravel. Place rock and coral in the aquarium. The aquarium must be covered since they are good jumpers. Origin: Western and Eastern Indian Diet: The diet of the Chestnut Blenny should include vegetable matter, including frozen and dried foods containing marine and blue-Bicolor algae.