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
Scientists believe that giant squids live for less than five years. This estimate is based on study of giant squid remains washed up on beaches. Giant squids are thought to hatch from tiny eggs and grow at a tremendous rate to achieve their 60 foot long adult size.Full Answer >
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 >
Squid engage in internal fertilization, but rather than using a penis for the transference of sperm cells, the males place a packet of sperm cells, called a spermatophore, into the femaleâ€™s mantle, or body cavity; however, individual squid species exhibit variations on this general model. Shortly after this sperm transfer takes place, the female excretes fertilized eggs into the water.Full Answer >
Squid are an important food source for many different fish, including most of the large predatory species. Marlins, tuna and groupers frequently eat squid, and sharks and rays consume the mollusks as well. In addition to fish, dolphins, whales, sea mammals and oceanic birds predate on squid.Full Answer >