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Shoaling and schooling. These powder blue tangs are shoaling. They are swimming somewhat independently, but in such a way that they stay connected, forming a social group. These bluestripe snapper are schooling. They are all swimming in the same direction in a coordinated way. In biology, any group of fish that stay together for social reasons ...
Forage fish, also called prey fish or bait fish, are small pelagic fish that feed on planktons (i.e. planktivores) and other small aquatic organisms (e.g. krill). They are in turn preyed upon by various predators including larger fish, seabirds and marine mammals, this making them keystone species in their aquatic ecosystems.
Bait ball. 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] It is a last-ditch defensive measure adopted by small schooling fish ...
A school of large pelagic predator fish (bluefin trevally) sizing up a school of small pelagic prey fish (). Pelagic fish live in the pelagic zone of ocean or lake waters—being neither close to the bottom nor near the shore—in contrast with demersal fish that live on or near the bottom, and reef fish that are associated with coral reefs.
Clupea sapidissima. The American shad (Alosa sapidissima) is a species of anadromous clupeid fish naturally distributed on the North American coast of the North Atlantic, from Newfoundland to Florida, [2] and as an introduced species on the North Pacific coast. The American shad is not closely related to the other North American shads.
Menhaden. Menhaden, also known as mossbunker and bunker and "the most important fish in the sea", [1] are forage fish of the genera Brevoortia and Ethmidium, two genera of marine fish in the order Clupeiformes. Menhaden is a blend of poghaden (pogy for short) and an Algonquian word akin to Narragansett munnawhatteaûg, derived from ...
Caesionidae are schooling fish, often in mixed species aggregations with other fusiliers. [8] The extensible upper jaws.are adapted for picking zooplankton. [7] Fusiliers are diurnal, they spend the day feeding in large aggregations in middle of the water column over reefs, along steep outer reef slopes and around pinnacles in deep water in ...
Slender Danios, or Zebrafish as they’re often called, are a hardy addition to any tank, they are especially suitable for most beginner aquarists. Famed for their striped zebra-like appearance ...