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==Tentacles in marine animals==
The phylum [[mollusca]] includes many species with [[muscular hydrostat]]s in the form of tentacles and arms ([[octopi]] do not have tentacles: they have arms). Tentacles are longer than arms and usually have suckers at their tips only. [[Squid]] and [[cuttlefish]] have eight arms like
The tentacles of the [[Giant Squid]] and [[Colossal Squid]] are particularly formidable, having powerful suckers and deadly [[teeth]] at the ends of the tentacle. The teeth of the Giant Squid are small, "bottle-cap" shaped [[circular]] saws, while the tentacles of the Colossal Squid wield two long rows of thick, sharp, finger-length screws of protruding bone.
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