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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.
For these freshwater snails, the siphon is an anti-predator adaptation. It reduces their vulnerability to being attacked and eaten by birds because it enables the apple snails to breathe without having to come all the way up to the surface, where they are easily visible to predators. [6]
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.
The very narrow toothed aperture of the cowry shell makes the adult shells difficult for many predators to reach into. However cowries are still vulnerable to predation: [2] Some tropical crustaceans can break the dorsum of a cowry shell. Some mollusc-eating cones, such as Conus textile, can inject venom into the cowry's flesh. The cone then ...
Cyclothone falls in the middle of the food web, and its main predators are slightly larger deep-sea fishes, such as dragonfish and fangtooths. [2] One adaptation that could lend a clue to our understanding of predator avoidance strategies in Cyclothone has to do with their bioluminescence. In the midwater region of the deep sea, predators ...
Through a process termed the "sponge-loop," they convert dissolved organic carbon released by reef organisms into particulate organic carbon that can be consumed by heterotrophic organisms. [4] Along with the coral–Symbiodiniaceae mutualism, this sponge-bacterial symbiosis helps explain Darwin's paradox, i.e., how highly productive coral reef ...
Nautilus have been observed to spend days in deeper areas around coral reefs, to avoid predation from turtles and carnivorous fish, and ascend to shallow areas of the reef during nights. [18] [11] Here, they engage in scavenging activity, seeking out animal remains, and the moults of crustaceans. Nautilus species usually travel and feed alone.
This process is a fundamental aspect of the life cycle of some marine organisms, including corals, mollusks, foraminifera, certain types of plankton, and other calcifying marine invertebrates. The resulting structures, such as shells , skeletons, and coral reefs, function as protection, support, and shelter and create some of the most ...