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187:" or "stalks" with "clubs" at their tips. In contrast the convention refers to the relatively shorter appendages as "arms". By this definition the eight appendages of octopuses, though quite long, count as arms. While arms are distinct from tentacles (a definition specific to the limb featuring peduncles), arms do fall within the general definition of "tentacle" as "a flexible, mobile, and elongated organ" and "tentacle" could be used as an
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175:, squid have spectacular tentacles. They take the form of highly mobile muscular hydrostats with various appendages such as suction disks and sometimes thorny hooks. Up to the early twentieth century "tentacles" were interchangeably called "arms". These tentacles are made of stalks of axial
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may be up to 37 m (121 ft) long. They are hollow and are arranged in 8 groups of between 70 and 150. The longer tentacles are equipped with cnidocytes whose venom paralyses and kills prey. The smaller tentacles guide food into the mouth.
287:(moss animals) are tiny creatures with tentacles around their mouths. The tentacles are almost cylindrical and have bands of cilia which create a water current towards the mouth. The animal extracts edible material from the flow of water.
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have two short tentacles, one on each side of the head, between their eyes and nostrils. The current opinion is that these tentacles supplement the normal sense of smell, possibly for navigation and to locate prey underground.
382:, has 22 short but conspicuous tentacles around its nose. They are mobile and extremely sensitive, helping the animal to find its way about the burrow and detect prey. They are about 1–4 mm long and hold about 25,000
420:) literally means "little tentacle". However, irrespective of size, it usually refers to a side branch of a larger tentacle. In some cases, such tentilla are specialised for particular functions; for example, in the
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that are covered by circular transverse muscle tissue that contract in response to stimuli. There is a layer of helical muscle that helps each tentacle to twist or turn in any direction where the prey is sensed.
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shows four tentacles which are covered by spines. These tentacles help the adult cestode to attach to the intestine of the shark or ray that they parasitize. The same tentacles are also present in the larvae.
149:, but they are not used for manipulation or prey capture. Molluscs have one pair of tentacles close to their mouths that hold close to their captured prey before they can consume it.
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141:, which usually have two sets of tentacles on the head: when extended the upper pair have eyes at their tips; the lower pair are
59:. In animal anatomy, tentacles usually occur in one or more pairs. Anatomically, the tentacles of animals work mainly like
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268:. The colloblasts burst open when prey comes in contact with the tentacle, releasing sticky threads that secure the food.
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728:"Diversity of trypanorhynch metacestodes in teleost fishes from coral reefs off eastern Australia and New Caledonia"
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Marine
Species Identification Portal : Zooplankton of the South Atlantic Ocean : Glossary : tentilla
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94:, but a cirrus is an organ that usually lacks the tentacle's strength, size, flexibility, or sensitivity. A
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The modern convention, however, is to speak of appendages as "tentacles" when they have relatively thin "
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210:, while the tentacles of the colossal squid wield two long rows of swiveling, tri-pointed hooks.
553:. Vol. 34: Molluscs, Trilobites, Brachiopods etc. London, England, U.K.: Macmillan Company.
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form, such as sea anemone and coral, the body is below with the tentacles pointed upwards.
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have powerful suckers and pointed teeth at the ends. The teeth of the giant squid resemble
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have two tentacles, while some have none. Their tentacles have adhesive structures called
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Many molluscs have tentacles of one form or another. The most familiar are those of the
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Beveridge, Ian; Bray, Rodney A.; Cribb, Thomas H.; Justine, Jean-Lou (2014).
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Varied organ found in many animals and used for palpation and manipulation
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Harmer, Sir Sidney
Frederic; Shipley, Arthur Everett et al. (1906)
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have numerous hair-like tentacles. Cnidarians have huge numbers of
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of particular foods or threats. Examples of such tentacles are the
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Front view of land snail showing upper and lower sets of tentacles
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This article is about tentacles in zoology. For other uses, see
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Deep-sea ctenophore trailing tentacles studded with tentilla
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Detail of one tentacle with its spines. Scale-bar: 0.01 mm.
630:"Wild Fact #419 – One Large Jelly – Lion's Mane Jellyfish"
462:"The Musculature of Coleoid Cephalopod Arms and Tentacles"
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160:, have numerous small tentacles around the edge of the
828:"Structure and function of the prehensile tentilla of
803:. Species-identification.org. Retrieved on 2013-05-02.
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cestode (only two tentacles shown). Scale-bar: 0.1 mm
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549:Cooke, A. H.; Shipley, Arthur Everett (1895).
440:are an example of Cnidaria that use tentilla.
826:Mackie G.O.; Mills C.E.; Singla C.L. (1988).
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466:Frontiers in Cell and Developmental Biology
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566:"CNIDARIANS: SIMPLE ANIMALS WITH A STING!"
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671:10.1002/9780470015902.a0001613.pub2
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254:Many species of the jellyfish-like
145:. Both pairs are fully retractable
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665:. eLS. John Wiley & Sons Ltd.
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460:Kier, William M. (February 2016).
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133:Abalone showing pallial tentacles
35:with two tentacles and eight arms
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51:present in some species of
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595:Kosner AW (10 July 2012).
572:. Oceanic Research Group.
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214:Cnidarians and ctenophores
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67:, variously receptive to
21:Tentacle (disambiguation)
832:(Ctenophora, Cydippida)"
744:10.1051/parasite/2014060
520:"Animals With Tentacles"
479:10.3389/fcell.2016.00010
904:Encyclopædia Britannica
799:2 December 2013 at the
243:on their tentacles. In
206:and function like tiny
564:Bird J (5 June 2007).
424:tentilla usually bear
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291:Trypanorhynch cestodes
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273:lion's mane jellyfish
271:The tentacles of the
194:The tentacles of the
164:. These are known as
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816:. Macmillan Company.
659:Claus N (May 2013).
83:of various kinds of
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147:muscular hydrostats
61:muscular hydrostats
851:10.1007/BF00312216
432:they usually have
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376:Condylura cristata
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306:A larva of
266:lasso cells
261:colloblasts
256:ctenophores
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177:nerve cords
173:cephalopods
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444:References
434:collocytes
430:Ctenophora
426:cnidocytes
359:caecilians
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752:1776-1042
711:ignored (
701:cite book
524:Pawnation
410:tentillum
408:The word
396:Tentillum
223:jellyfish
208:hole saws
185:peduncles
158:Trochidae
81:eyestalks
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886:Archived
883:Tentacle
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685:Archived
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333:cestodes
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280:Bryozoa
154:abalone
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337:scolex
171:Among
162:mantle
92:cirrus
85:snails
73:vision
866:(PDF)
855:S2CID
835:(PDF)
378:, of
249:polyp
237:coral
232:Hydra
100:squid
69:touch
49:organ
766:PMID
748:ISSN
713:help
693:2013
675:ISBN
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370:The
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