how big do these species grow?
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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
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Vampire squid [SEP] Introduction
The vampire squid ("Vampyroteuthis infernalis", lit. "vampire squid from Hell") is a small cephalopod found throughout temperate and tropical oceans in extreme deep sea conditions. Unique retractile sensory filaments justify the vampire squid's placement in its own order, Vampyromorphida, as it shares similarities with both octopuses and squid, but is now known to be more closely related to octopuses. As a phylogenetic relict, it is the only known surviving member of its order. The first specimens were collected on the Valdivia Expedition and they were originally described as an octopus in 1903 by German teuthologist Carl Chun, but later assigned to a new order together with several extinct taxa.