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They emit light during night time to camouflage themselves against the moon and star light coming down the ocean. It helps them to avoid predators. The symbiosis process begins when Peptidoglycan shed by the sea water bacteria comes in contact to the ciliated epithelial cells of the light organ. It induces mucus production in the cells.
Some larger zooplankton also feed on smaller zooplankton. Some zooplankton can jump about a bit to avoid predators, but they can't really swim. Like phytoplankton, they float with the currents, tides and winds instead. Zooplankton can reproduce rapidly, their populations can increase up to thirty per cent a day under favourable conditions.
As is the case in many bivalves, cockles display gonochorism (the sex of an individual varies according to conditions), [3] and some species reach maturity rapidly. The common name "cockle" is also given by seafood sellers to a number of other small, edible marine bivalves which have a somewhat similar shape and sculpture, but are in other ...
Sacoglossans can also use antiherbivory compounds produced by their algal foodstuffs to deter their own would-be predators, in a process termed kleptochemistry. [10] This may be achieved by converting algal metabolites to toxins, [ 15 ] or by using algal pigments for camouflage in a process termed nutritional homochromy.
Species that are better able to avoid predators also tend to migrate before those with poorer swimming capabilities. Squid are a primary prey for Risso's dolphins (Grampus griseus), an air-breathing predator, but one that relies on acoustic rather than visual information to hunt. Squid delay their migration pattern by about 40 minutes when ...
Warmer temperatures could send appetites into overdrive, causing larger predators to wipe out smaller prey. Warmer temperatures could send appetites into overdrive, causing larger predators to ...
The surface-dwelling nudibranch, Glaucus atlanticus, is a specialist predator of siphonophores, such as the Portuguese man o' war. This predatory mollusc sucks air into its stomach to keep it afloat, and using its muscular foot, it clings to the surface film.
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