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An ectotherm (from the Greek ἐκτός ( ektós) "outside" and θερμός ( thermós) "heat"), more commonly referred to as a " cold-blooded animal ", [1] is an animal in which internal physiological sources of heat, such as blood, are of relatively small or of quite negligible importance in controlling body temperature. [2]
A deep-sea species of carnivorous sponge (Cladorhizidae) Many Cnidarians. Sea pens. Renilla reniformis; Coral; Certain Jellyfish. Aequorea victoria; Atolla jellyfish; Helmet jellyfish; Certain Ctenophores (comb jellies) Some Tunicates: Larvaceans; Salps; Ascidiacea; Doliolida; Pyrosomes; Certain echinoderms (e.g. Ophiurida) Amphiura filiformis
Sea angels ( clade Gymnosomata) are a large group of small free-swimming sea slugs, not to be confused with Cnidarians (Jellyfish and other similar creatures), classified into six different families. They are pelagic opisthobranchs in the clade Gymnosomata within the larger mollusc clade Heterobranchia. Sea angels were previously referred to as ...
Marine life, sea life, or ocean life is the plants, animals, and other organisms that live in the salt water of seas or oceans, or the brackish water of coastal estuaries. At a fundamental level, marine life affects the nature of the planet. Marine organisms, mostly microorganisms, produce oxygen and sequester carbon.
A leopard seal ( Hydrurga leptonyx) Marine mammals are mammals that rely on marine (saltwater) ecosystems for their existence. They include animals such as cetaceans ( whales, dolphins and porpoises ), pinnipeds ( seals, sea lions and walruses ), sirenians ( manatees and dugongs ), sea otters and polar bears. They are an informal group, unified ...
The list of marine animals of Australia (temperate waters) is a list of marine and shore-based species that form a part of the fauna of Australia. This list includes animals which either live entirely marine lives, or which spend critical parts of their lives at sea. The geographical range is south of Perth, Western Australia and the border of ...
Thelenota ananas, a giant sea cucumber from the Indo-Pacific tropics. Sea cucumbers are echinoderms from the class Holothuroidea ( / ˌhɒləˌθjʊəˈrɔɪdiə, ˌhoʊ -/ HOL-ə-thure-OY-dee-ə, HOHL- ). They are marine animals with a leathery skin and an elongated body containing a single, branched gonad. They are found on the sea floor ...
The adult lamprey is characterized by a toothed, funnel-like sucking mouth. The common name "lamprey" is probably derived from Latin lampetra, which may mean "stone licker" ( lambere "to lick" + petra "stone"), though the etymology is uncertain. [3] Lamprey is sometimes seen for the plural form. [4]