A
cephalopod arm is distinct from a tentacle, though the terms are often used interchangeably.
By definition,
cephalopod{Taxobox| name = Cephalopods| fossil_range = | image = Tafel 054 300.jpg| image_caption = A variety of cephalopod forms from Ernst Haeckel's 1904 Kunstformen der Natur| regnum = Animalia| image_width = 220px| phylum = Mollusca| classis = Cephalopoda...
arms have
suckerSucker may refer to:* Lollipop or sucker, a type of confection* Basal shoot or sucker, a shoot or cane that grows from the base of a tree or shrub* Sucker or Catostomidae, a family of fish of the order Cypriniformes...
s along most of their length, as opposed to tentacles, which have suckers only near their ends.
The eight arms of
octopusThe octopus is a cephalopod of the order Octopoda. The octopus inhabits many diverse regions of the ocean, especially coral reefs. The term may also be used to refer only to those creatures in the genus Octopus...
es are usually called such to avoid confusion, as other cephalopods,
squidSquid are marine cephalopods of the order Teuthida, which comprises around 300 species. Like all other cephalopods, squid have a distinct head, bilateral symmetry, a mantle, and arms. Squid, like cuttlefish, have eight arms and two longer tentacles arranged in pairs...
and
cuttlefishCuttlefish are marine animals of the order Sepiida belonging to the Cephalopoda class . Despite their common name, cuttlefish are not fish but mollusks...
usually have eight arms and two distinct tentacles.
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A
cephalopod arm is distinct from a tentacle, though the terms are often used interchangeably.
By definition,
cephalopod{Taxobox| name = Cephalopods| fossil_range = | image = Tafel 054 300.jpg| image_caption = A variety of cephalopod forms from Ernst Haeckel's 1904 Kunstformen der Natur| regnum = Animalia| image_width = 220px| phylum = Mollusca| classis = Cephalopoda...
arms have
suckerSucker may refer to:* Lollipop or sucker, a type of confection* Basal shoot or sucker, a shoot or cane that grows from the base of a tree or shrub* Sucker or Catostomidae, a family of fish of the order Cypriniformes...
s along most of their length, as opposed to tentacles, which have suckers only near their ends.
The eight arms of
octopusThe octopus is a cephalopod of the order Octopoda. The octopus inhabits many diverse regions of the ocean, especially coral reefs. The term may also be used to refer only to those creatures in the genus Octopus...
es are usually called such to avoid confusion, as other cephalopods,
squidSquid are marine cephalopods of the order Teuthida, which comprises around 300 species. Like all other cephalopods, squid have a distinct head, bilateral symmetry, a mantle, and arms. Squid, like cuttlefish, have eight arms and two longer tentacles arranged in pairs...
and
cuttlefishCuttlefish are marine animals of the order Sepiida belonging to the Cephalopoda class . Despite their common name, cuttlefish are not fish but mollusks...
usually have eight arms and two distinct tentacles. When the context is clear, octopus arms may instead be called tentacles.
See also
- Hectocotylus
A hectocotylus is one of the arms of the male of most kinds of cephalopods that is modified in various ways to affect the fertilization of the female's eggs. It is a specialized, extended tentacle used to store spermatophores, the male gamete. Males generally form a new hectocotylus in each new...
- specialised male arm for sperm delivery
- Dactylus
The dactylus is the tip region of the tentacular club of cephalopods and of the leg of some crustaceans . In cephalopods, the dactylus is narrow and often characterized by the asymmetrical placement of suckers and the absence of a dorsal protective membrane...
- tip of tentacular club