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Gladius, showing measurement of rachis and vane. The gladius (pl.: gladii), or pen, is a hard internal bodypart found in many cephalopods of the superorder Decapodiformes (particularly squids) and in a single extant member of the Octopodiformes, the vampire squid (Vampyroteuthis infernalis). [1]
Histioteuthis heteropsis, known as the strawberry squid, is a species of small cock-eyed squid. [2] The scientific nomenclature of these squid stems from their set of differently sized eyes, one being small and blue and the other being large and yellow.
Cephalopod limbs bear numerous suckers along their ventral surface as in octopus, squid and cuttlefish arms and in clusters at the ends of the tentacles (if present), as in squid and cuttlefish. [9] Each sucker is usually circular and bowl-like and has two distinct parts: an outer shallow cavity called an infundibulum and a central hollow ...
The glass squid from the family Cranchiidae is nearly transparent with the exception of a few body parts, such as its eyes. When predators look down from below, they are searching the water for ...
The two-part beak of the giant squid, Architeuthis sp. All living cephalopods have a two-part beak; [12]: 7 most have a radula, although it is reduced in most octopus and absent altogether in Spirula. [12]: 7 [98]: 110 They feed by capturing prey with their tentacles, drawing it into their mouth and taking bites from it. [25]
There are around 300 species of squid living in the ocean and they can range in size from less than an inch to the massive 50-foot-long giant squid. The strawberry squid ( Histioteuthis heteropsis ...
Squid are also known to be sensitive to temperature, salinity, and circulation in the water. [10] These habitat components can affect reproduction and life cycles. Chinese spear squid at different growth stages sometimes have different names among fishermen: they call the larvae of squid "small rolls", and the sub-adults are called "middle ...
In a 1990 study of dermal structures in squid, Clyde F. E. Roper and C. C. Lu wrote that they were "unable to suggest a function" for the tubercles of this species, but that due to their small size and spacing they were unlikely to be involved in buoyancy or locomotion.