Chromatophores are color-changing cells that allow some animals, such as cephalopods, a class of molluscs that includes octopuses, squids and cuttlefish, to blend in with their surrounding environments. Chromatophores are also used to communicate different messages to potential mates, rivals and predators.Know More
Chromatophores are cells that comprise pigment-filled sacs found just below the skin of cephalopods with the exception of the chambered nautilus, which lacks this biological adaptation. These cells expand and contract to exhibit different pigments, which allows the animal to change the color of its body to resemble its environment for defense, hunting and mating purposes.
Squids employ chromatophores to virtually disappear at will in the presence of predators and rivals and to entice prey and potential mates. The number of individual cells found on a squid's body determines the complexity of the pattern produced.
In the dark depths of the ocean, this ability to change color is bolstered by the presence of photophores, which are light-emitting cells found across the bodies of many species of squid. Photophores permit bioluminescence, whereby light-producing organs emit illumination from across the body of the animal. These light producers range from a simple collection of cells to a complex arrangement of lenses, filters, shutters and reflectors.Learn more about Squid
According to Squid-World, there are over 300 species of squid that have been identified. All of the identified squid are classified into one of two categories, either myopsida or oegopsida.Full Answer >
Giant squid live in every ocean on Earth but are particularly concentrated over the slopes leading up to continents and islands. They are rare in tropical and high polar regions. Giant squid live only in deep, cold water because their blood is incapable of carrying oxygen effectively at higher temperatures.Full Answer >
Squids are carnivorous predators that primarily prey on fish, crustaceans and other squid. Because squid vary greatly in size â€“ some species are less than 1 inch in length, while others exceed 30 feet in length â€“ their specific prey preferences differ markedly from one species to the next. Some squid hunt by chasing down their prey, while others hide and lie in wait for food to swim past them.Full Answer >
Like all cephalopods, squid start their lives as paralarvae. Unlike true larvae, paralarvae "are not morphologically distinct from adults," according to The Coral Digest. They are, instead, miniature versions of the mature species, though they "may occupy different ecological niches."Full Answer >