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Cuttlefish have large, W-shaped pupils, eight arms, and two tentacles furnished with denticulated suckers, with which they secure their prey. They generally range in size from 15 to 25 cm (6 to 10 in), with the largest species , the giant cuttlefish ( Sepia apama ), reaching 50 cm (20 in) in mantle length and over 10.5 kg (23 lb) in mass.
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]
Many beaks have also been discovered in the stomachs of sperm whales, as the stomach juices dissolve the soft flesh of the squid, leaving the hard beaks behind. The largest beak ever discovered in this way had a lower rostral length of 49 millimeters (1 + 15 ⁄ 16 in), indicating that the original squid was 600 to 700 kilograms (1,300 to 1,500 ...
The beak of a giant squid. All extant cephalopods have a two-part beak, or rostrum, situated in the buccal mass and surrounded by the muscular head appendages. The dorsal (upper) mandible fits into the ventral (lower) mandible and together they function in a scissor-like fashion. [1] [2] The beak may also be referred to as the mandibles or jaws ...
The cuttlebone of a cuttlefish. This is the largest hard part of a cuttlefish, maintaining the rigidity of its body.. The common cuttlefish is one of the largest species of cuttlefish with a mantle length reaching up to 45 cm and a mass of 4 kg on a presumed male, although this is for an exceptional specimen in temperate waters; specimens in subtropical waters rarely surpass a mantle length of ...
In female cuttlefish, the suckers on two pairs of arms are in rows of four. Then on the other pair of arms, the suckers are in rows of four only on the distal third of the arms. Additionally, the area that surrounds the cuttlefish's beak, called the buccal membrane, is covered with longitudinal ridges. [12]
The cuttlefish will then rapidly launch its feeding tentacles to grab the prey and pull it towards its oral cavity. The cuttlefish will hold onto its prey with its arms and inject it with venom to paralyze it. [9] Once the prey is sedated, the cuttlefish will bite off small pieces with its beak.
This cuttlefish can also be identified by its beak, which is useful for examining the stomachs of fish. [11] Of the Sepia genus, S. braggi is only species that does not have a darkened lateral band on the upper and lower beak. Also, on the upper beak, the fully darkened section is much smaller (2.6 mm) than other species of Sepia.