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Sleep in fish. Sleep can be defined in birds and mammals by eye closure and typical electrical patterns in the neocortex, but fish lack eyelids and a neocortex. Yet this oscar is behaviorally quiescent at night, lying unresponsive on the bottom with its eyes turned downward, and might be said to sleep. [1]
Synchiropus splendidus, the mandarinfish or mandarin dragonet, is a small, brightly colored member of the dragonet family, which is popular in the saltwater aquarium trade. The mandarinfish is native to the Pacific, ranging approximately from the Ryukyu Islands south to Australia. It can usually be found in some of the warmer waters.
Also known as suckermouth catfish, plecos are considered to be a good fish for beginners. Lovers of algae, these peaceful fish won’t demand any special water parameters to stay happy or healthy ...
Clown loach. The clown loach (Chromobotia macracanthus), or tiger botia, [1] is a tropical freshwater fish belonging to the botiid loach family. It is the sole member of the genus Chromobotia. It originates in inland waters in Indonesia on the islands of Sumatra and Borneo. In Sentarum, West Borneo that fish named: ulanguli.
Betta fish can exhibit unusual sleep behaviors, often resulting in new betta owners assuming that their betta fish has died. In an aquarium, betta fish sleep anywhere in the tank they feel comfortable, including at the bottom on the substrate, floating at the mid-level, or at the surface. Betta fish will sleep on their side, upside down, with ...
The kuhli loach is an eel-shaped fish with slightly compressed sides, four pairs of barbels around the mouth, and very small fins. The dorsal fin starts behind the middle of the body, and the anal fin well behind this. The eyes are covered with transparent skin. The body has 10 to 15 dark brown to black vertical bars, and the gaps between them ...
The Banggai cardinalfish (Pterapogon kauderni) is a small tropical cardinalfish in the family Apogonidae. It is the only member of its genus. [2] This attractive fish is popular in the aquarium trade. It is among the relatively few marine fish to have been bred regularly in captivity, but significant numbers are still captured in the wild and ...
The common minnow is a small fish which reaches a maximum total length of 14 centimetres (5⁄ in), but is normally around 7 centimetres (3 in) in length. It has 3 spines and 6–8 soft rays in its dorsal fin with 3 spines and 6–8 soft rays in its anal fin. Its spine is made up of 38–40 vertebrae. It is distinguished from similar species ...