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Cuttlefish change color and pattern (including the polarization of the reflected light waves), and the shape of the skin to communicate to other cuttlefish, to camouflage themselves, and as a deimatic display to warn off potential predators. Under some circumstances, cuttlefish can be trained to change color in response to stimuli, thereby ...
The cuttlebone of a cuttlefish. This is the largest hard part of a cuttlefish, maintaining the rigidity of its body.. The common cuttlefish is one of the largest species of cuttlefish with a mantle length reaching up to 45 cm and a mass of 4 kg on a presumed male, although this is for an exceptional specimen in temperate waters; specimens in subtropical waters rarely surpass a mantle length of ...
Jellyfish. Spotted jellies swimming in a Tokyo aquarium. Jellyfish, also known as sea jellies, are the medusa -phase of certain gelatinous members of the subphylum Medusozoa, which is a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals with umbrella-shaped bells and trailing tentacles, although a few are ...
Evolution of cephalopods. The cephalopods have a long geological history, with the first nautiloids found in late Cambrian strata. [ 1 ] The class developed during the middle Cambrian, and underwent pulses of diversification during the Ordovician period [ 2 ] to become diverse and dominant in the Paleozoic and Mesozoic seas.
Sepia (cephalopod) Sepia. (cephalopod) Sepia is a genus of cuttlefish in the family Sepiidae encompassing some of the best known and most common species. The cuttlebone is ellipsoid in shape. The name of the genus is the Latinised form of the Ancient Greek σηπία (sēpía) "cuttlefish".
Coleoidea[1][2] or Dibranchiata is one of the two subclasses of cephalopods containing all the various taxa popularly thought of as "soft-bodied" or "shell-less" (i.e. octopus, squid and cuttlefish). Unlike its extant sister group Nautiloidea, whose members have a rigid outer shell for protection, the coleoids have at most an internal shell ...
Sepia latimanus is a coastal species occurring in coral reefs and which is found in shallow water to depths of 30 m. In the western Pacific, off Guam and off Okinawa in the shallows from January to May, and the resultant eggs hatch in 38 to 40 days. It is diurnal species which appears to mesmerise its prey by using a display consisting of a ...
Sepia elegans is a small species of cuttlefish [ 3] which has an elongated mantle which is oval in shape and has a length that is more than two times greater than its width, [ 4] with a maximum mantle length of 80mm. [ 5] It has a short, broad tentacular club which is blunt towards its tip and has 6-8 suckers in oblique, crosswise rows.