with reference to the creature's class mentioned earlier, what are the other creatures that belong to this class?
octopus, cuttlefish, or nautilus.
Cephalopod
A cephalopod () is any member of the molluscan class Cephalopoda (Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus.
squid are members of what phylum and what class They are members of the class Cephalopoda, subclass Coleoidea. with reference to the class mentioned, what is the meaning of the name it derives? UNANSWERABLE with reference to the creature mentioned, how would you describe its physical appearance? The head and foot of the squid are at one end of a long body, and this end is functionally anterior, leading the animal as it moves through the water. A set of eight arms and two distinctive tentacles surround the mouth; each appendage takes the form of a muscular hydrostat and is flexible and prehensile, usually bearing disc-like suckers. from which part of their body do these creatures release ink? The ink gland and its associated ink sac empties into the rectum close to the anus, allowing the squid to rapidly discharge black ink into the mantle cavity and surrounding water. why do these release this substance? Squid distract attacking predators by ejecting a cloud of ink, giving themselves an opportunity to escape. what are the features of their nervous system? Squids have a complex brain in the form of a nerve ring encircling the oesophagus, enclosed in a cartilaginous cranium. Paired cerebral ganglia above the oesophagus receive sensory information from the eyes and statocysts, and further ganglia below control the muscles of the mouth, foot, mantle and viscera. do these creatures have a specific breeding season? Courtship in squid takes place in the open water and involves the male selecting a female, the female responding, and the transfer by the male of spermatophores to the female. In many instances, the male may display to identify himself to the female and drive off any potential competitors. what is the maximum length the largest species can grow? UNANSWERABLE what do these creatures feed on? Squid are carnivores how would you describe the structure of their heart? They have a main systemic heart that pumps blood around the body as part of the general circulatory system, and two branchial hearts. what is the peculiar feature in their bodies that is responsible to keep these creatures' buoyancy? They have a fluid-filled receptacle, equivalent to the swim bladder of a fish, in the coelom or connective tissue. This reservoir acts as a chemical buoyancy chamber, with the heavy metallic cations typical of seawater replaced by low molecular-weight ammonium ions, a product of excretion. what the various species of this creature? The vampire squid, bobtail squid, ram's horn squid, etc. in which oceans will you find the first species mentioned? They are found throughout temperate and tropical oceans in extreme deep sea conditions how big do these species grow? UNANSWERABLE have they developed any adaptations to thrive in the deep sea? Their blue blood's hemocyanin binds and transports oxygen more efficiently than in other cephalopods, aided by gills with an especially large surface area. The animals have weak musculature, but maintain agility and buoyancy with little effort because of sophisticated statocysts and ammonium-rich gelatinous tissues closely matching the density of the surrounding seawater. how would you describe the physical appearance of this species? Vampire's gelatinous body varies in colour from velvety jet-black to pale reddish, depending on location and lighting conditions. A webbing of skin connects its eight arms, each lined with rows of fleshy spines or cirri; the inner side of this "cloak" is black. Only the distal halves (farthest from the body) of the arms have suckers. Its limpid, globular eyes, which appear red or blue, depending on lighting, are proportionately the largest in the animal kingdom at in diameter.
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Cephalopod [SEP] Introduction
A cephalopod () is any member of the molluscan class Cephalopoda (Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles (muscular hydrostats) modified from the primitive molluscan foot. Fishermen sometimes call cephalopods "inkfish," referring to their common ability to squirt ink. The study of cephalopods is a branch of malacology known as teuthology. Cephalopods became dominant during the Ordovician period, represented by primitive nautiloids. The class now contains two, only distantly related, extant subclasses: Coleoidea, which includes octopuses, squid, and cuttlefish; and Nautiloidea, represented by "Nautilus" and "Allonautilus".