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This species is part of the smallest known squid genus, growing only to 16 mm (0.63 in) in mantle length. [3] [4] Females tend to be larger than males, and the presence of nidamental glands for secretion of egg jelly differentiates them from males. [5] Males can be identified by the presence of a singular white testis found posteriorly in the ...
Females lay their eggs then die immediately after. The males, however, can fertilize many females in a short period of time before they die. Females lay the eggs in well-protected areas scattered around the reefs. After competing with 2-5 other males, the largest male approaches the female and gently strokes her with his tentacles.
Perhaps the best video of a live colossal squid is that of an animal recorded at the surface in the D'Urville Sea off Antarctica in January 2008. [21] The squid was pulled to the surface feeding on a line-caught toothfish. The video is likely the first to show a colossal squid swimming freely, and records the animal performing a slow roll on ...
E. hyllebergi females deposit single, white pyramid-shaped egg capsules. Two hours after being laid, the outer layer of the eggs become a brown color and, after 5 days, eggs become transparent with the embryo visible. After an incubation period of 12 to 16 days, E. hyllebergi hatchlings emerge in a planktonic state with a visible internal yolk sac.
The size of the egg mass correlates with the size of the female that laid it; large females can lay egg masses up to 3–4 m in diameter, [36] while smaller females lay egg masses about one meter in diameter. Records of egg masses are extremely sparse because they are rarely encountered by humans, but from the few masses found to date, the egg ...
When laying eggs, female G. onyx have been found at even deeper depths. They have been observed holding egg mass in their arms between 1,500 and 2,600 m (4,900 and 8,500 ft), with one female seen brooding an egg mass in Monterey Canyon at a depth of 1,590 m (5,220 ft).
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 ...
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."