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Species normally quiescent at night become active day and night during the spawning season. [1] Many parental species forego sleep at night and fan their eggs day and night for many days in a row. This has been observed in threespine stickleback , [ 34 ] convict cichlid and rainbow cichlid , [ 35 ] [ 36 ] various species of damselfish , [ 37 ...
Hierarchy during feeding is commonly observed, in which the larger goldfish receives most of the food. However, small goldfish may become aggressive or competitive feeders despite the presence of larger fish, which is usually considered a good sign, as a willingness to feed indicates a healthy goldfish.
A recent study in the Journal of Great Lakes Research shed light on the growing problem of goldfish proliferating outside of the proverbial fish bowl.
They can feed at the surface, in mid-water, or at the bottom. They can locate prey visually, or filter-feed on high-density zooplankton without resorting to visual cues. [ 8 ] They are themselves food for all manner of game fish such as trout and bass , hence their popularity as bait fish.
The lake sturgeon (Acipenser fulvescens), also known as the rock sturgeon, [7] is a North American temperate freshwater fish, one of about 25 species of sturgeon.Like other sturgeons, this species is a bottom feeder and has a partly cartilaginous skeleton, an overall streamlined shape, and skin bearing rows of bony plates on the sides and back.
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Ocean halfbeaks are omnivores which feed on algae, plankton, marine plants like seagrass, invertebrates like pteropods and crustaceans and smaller fishes. [9] Some tropical species feed on animals during the day and plants at night, while others alternate summer carnivory with winter herbivory. [10] They are in turn eaten by billfish, mackerel ...
Because fish feeders generally cannot feed frozen or live food, they are not effective options for feeding most predatory fish. [ 9 ] [ 10 ] Similarly, most (though not all), designs of feeder only allow for one type of food at a time, (flaked or granular), therefor fish communities requiring both floating and sinking foodstuffs are not well ...