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This is a list of nocturnal animals and groups of animals. There is also a more specific list of nocturnal birds . This is a dynamic list and may never be able to satisfy particular standards for completeness.
Found almost exclusively in fresh water (the only exceptions are species that occasionally may visit brackish water to feed), these mostly nocturnal fish are capable of producing electric fields to detect prey, for navigation, communication, and, in the case of the electric eel (Electrophorus electricus), attack and defense. [2]
Nocturnal species take advantage of the night time to prey on species that are used to avoiding diurnal predators. Some nocturnal fish species will use the moonlight to prey on zooplankton species that come to the surface at night. [8] Some species have developed unique adaptations that allow them to hunt in the dark.
The natural habitat of the kuhli loach is the sandy beds of slow-moving rivers and clean mountain streams. They are a social fish and are typically found in small clusters (they are not schooling fish but enjoy the company of their species), but are cautious and nocturnal by nature and swim near the bottom where they feed around obstacles ...
A deep-sea species of carnivorous sponge (Cladorhizidae) [6] Many Cnidarians. Sea pens. Renilla reniformis; Coral; Certain Jellyfish. Aequorea victoria; Atolla jellyfish; Helmet jellyfish; Certain Ctenophores (comb jellies) Some Tunicates: Larvaceans [7] Salps [8] Ascidiacea [9] Doliolida [10] Pyrosomes [11] Certain echinoderms (e.g. Ophiurida ...
The clown featherback (Chitala ornata), also known as the clown knifefish and spotted knifefish, is a nocturnal species of tropical fish with a long, knife-like body. This knifefish is native to freshwater habitats in Cambodia, China, Hong Kong, Laos, Macau, Thailand, and Vietnam, [2] but it has also been introduced to regions outside its native range. [1]
Corydoras acutus; Corydoras adolfoi; Corydoras aeneus [2]; Corydoras agassizii; Corydoras ambiacus; Corydoras atropersonatus; Corydoras axelrodi; Corydoras barbatus
Within the same laboratory populations of goldfish, some individuals may be spontaneously diurnal while others are nocturnal. [43] Goldfish can also be diurnal if food is more available by day, or nocturnal if food is available at night. [44] Salmon are mostly diurnal when temperature is high, but become more nocturnal if temperature plummets. [45]