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A school of fish has many eyes that can scan for food or threats Pacific sardine school reacting to attention from yellowfin tuna These sometimes immense gatherings fuel the ocean food web . Most forage fish are pelagic fish , which means they form their schools in open water, and not on or near the bottom ( demersal fish ).
School of Fish was an alternative rock band which formed in 1989 and disbanded in 1994. The core members were Josh Clayton-Felt (lead vocals and guitar) and Michael Ward (guitar). School of Fish released two albums and are remembered for the hit single "3 Strange Days" (1991).
A school of bluefin trevally working a school of anchovies which may compact into a spherical bait ball if they are sufficiently threatened. A bait ball, or baitball, occurs when small fish swarm in a tightly packed spherical formation about a common centre. [1]
A flock of auklets exhibit swarm behaviour. Swarm behaviour, or swarming, is a collective behaviour exhibited by entities, particularly animals, of similar size which aggregate together, perhaps milling about the same spot or perhaps moving en masse or migrating in some direction.
For example, a large school of fish can cause nearby sharks, such as the lemon shark, to enter into a feeding frenzy. [1] This can cause the sharks to go wild, biting anything that moves, including each other or anything else within biting range. Another functional explanation for feeding frenzy is competition amongst predators. [2]
Anadromous – fish that live their adult lives in the ocean but migrate up fresh water rivers to spawn. Examples are Pacific salmon. Fish that migrate in the opposite direction are called catadromous. Anoxic sea water – sea water depleted of oxygen. See hypoxia. Anoxic sediments – sediments depleted of oxygen.
Several koi swim around in a pond in Japan. (video) A school of koi containing multiple different varieties Koi (鯉, Japanese:, literally "carp"), or more specifically nishikigoi (錦鯉, Japanese: [ɲiɕi̥kiꜜɡoi], literally "brocaded carp"), are colored varieties of carp (Cyprinus sp.) that are kept for decorative purposes in outdoor koi ponds or water gardens.
However, fish have an optokinetic reflex in their visual systems that can be sensitive to moving stripes. [118] For fish to school efficiently, they need feedback mechanisms that help them align themselves with adjacent fish, and match their speed. The stripes on neighbouring fish provide "schooling marks", which signal changes in relative ...