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  2. Gladius (cephalopod) - Wikipedia

    en.wikipedia.org/wiki/Gladius_(cephalopod)

    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]

  3. Cephalopod intelligence - Wikipedia

    en.wikipedia.org/wiki/Cephalopod_intelligence

    These are capable of complex reflex actions without input from the brain. [1] Cephalopod intelligence is a measure of the cognitive ability of the cephalopod class of molluscs. Intelligence is generally defined as the process of acquiring, storing, retrieving, combining, comparing, and recontextualizing information and conceptual skills. [2]

  4. Cephalopod - Wikipedia

    en.wikipedia.org/wiki/Cephalopod

    Squid, on the other hand, can be found to travel vast distances, with some moving as much as 2,000 km in 2.5 months at an average pace of 0.9 body lengths per second. [81] There is a major reason for the difference in movement type and efficiency: anatomy.

  5. Fish anatomy - Wikipedia

    en.wikipedia.org/wiki/Fish_anatomy

    One of the brain areas that receives primary input from the lateral line organ, the medial octavolateral nucleus, has a cerebellum-like structure, with granule cells and parallel fibers. In electrosensitive fish, the input from the electrosensory system goes to the dorsal octavolateral nucleus, which also has a cerebellum-like structure.

  6. Squid giant synapse - Wikipedia

    en.wikipedia.org/wiki/Squid_giant_synapse

    The squid giant synapse (Fig 1) was first recognized by John Zachary Young in 1939. It lies in the stellate ganglion on each side of the midline, at the posterior wall of the squid’s muscular mantle. Activation of this synapse triggers a synchronous contraction of the mantle musculature, causing the forceful ejection of a jet of water from ...

  7. Squid giant axon - Wikipedia

    en.wikipedia.org/wiki/Squid_giant_axon

    On the underside of the squid's body, between the head and the mantle, is a siphon through which water can be rapidly expelled by the fast contractions of the body wall muscles of the animal. This contraction is initiated by action potentials in the giant axon.

  8. Cephalopod eye - Wikipedia

    en.wikipedia.org/wiki/Cephalopod_eye

    Cephalopods, as active marine predators, possess sensory organs specialized for use in aquatic conditions. [1] They have a camera-type eye which consists of an iris, a circular lens, vitreous cavity (eye gel), pigment cells, and photoreceptor cells that translate light from the light-sensitive retina into nerve signals which travel along the optic nerve to the brain. [2]

  9. Taningia danae - Wikipedia

    en.wikipedia.org/wiki/Taningia_danae

    Taningia danae, the Dana octopus squid, is a species of squid in the family Octopoteuthidae. It is one of the largest known squid species , reaching a mantle length of 1.7 m (5.6 ft) [ 3 ] and total length of 2.3 m (7.5 ft). [ 4 ]