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Gonatus onyx is in the class Cephalopoda and in the phylum Mollusca.It is also known as the clawed arm hook squid or the black-eyed squid.It got these names from the characteristic black eye and from its two arms with clawed hooks on the end that extend a bit further than the other arms.
The longfin inshore squid spawns year-round and lives for less than one year. "Eggs are demersal. Enclosed in a gelatinous capsule containing up to 200 eggs. Each female lays 20-30 capsules. Fecundity ranges from 950–15,900 eggs per female. Laid in masses made up of hundreds of egg capsules from different females."
Some egg beds can cover acres of the ocean floor. The eggs take 3–8 weeks to hatch with warmer water shortening the incubation time. Bat stars (Asterina miniatus) are the most prevalent predators of eggs. Fish do not eat them, although they will nip at eggs not covered by the capsule sheath. There is no brooding. Doryteuthis opalescens paralarva
Adults venture out into open water and can be found in depths up to 150 m. When mating, adults are found near coral reefs in depths of 1.5 to 8 metres (5 to 26 ft). The Caribbean reef squid is the only squid species commonly sighted by divers over inshore reefs in the Florida, Bahamas and Caribbean regions.
A video shows the long creature with tentacles and large eyes floating through the water and excreting a cloud of greenish-yellow ink. “Note the abstract shapes made by the squid inking: Squids ...
The bigfin reef squid is a neritic warm water-dwelling squid. [citation needed] They are usually found 0 to 100 m (0 to 328 ft) below the water's surface. [25] They tend to remain close to the shoreline, near rocks and reefs. [31] [32] They are slightly more active during the night and will move to deeper waters or find cover in daytime. Large ...
Squid can expel up to 94% of the fluid within their cavity in a single jet thrust. [68] To accommodate the rapid changes in water intake and expulsion, the orifices are highly flexible and can change their size by a factor of 20; the funnel radius, conversely, changes only by a factor of around 1.5. [76]
The firefly squid inhabits the waters off the coast of Japan. [13] [14] The depth at which these squids can be found varies (300–400 m or 1,000–1,300 ft during the day, and 20–60 m or 70–200 ft during the night) over the course of a day, [14] as they are one of the several species of squid that participates in diel vertical migration.