Search results
Results From The WOW.Com Content Network
Sea urchins or urchins ( / ˈɜːrtʃɪnz /) are typically spiny, globular animals, echinoderms in the class Echinoidea. About 950 species live on the seabed, inhabiting all oceans and depth zones from the intertidal to 5,000 metres (16,000 ft; 2,700 fathoms). [ 1] Their tests (hard shells) are round and spiny, typically from 3 to 10 cm (1 to 4 ...
This is the chemical reaction in which chemical energy is converted to light energy. It is estimated that 90% of deep-sea animals produce some sort of bioluminescence. Considering that a large proportion of the visible light spectrum is absorbed before reaching the deep sea, most of the emitted light from the sea-animals is blue and green.
Porpita porpita, or the blue button, is a marine organism consisting of a colony of hydroids [ 2] found in the warmer, tropical and sub-tropical waters of the Pacific, [ 3] Atlantic, and Indian oceans, as well as the Mediterranean Sea and eastern Arabian Sea. [ 4] It was first identified by Carl Linnaeus in 1758, under the basionym Medusa ...
Ascidiacea, commonly known as the ascidians or sea squirts, is a paraphyletic class in the subphylum Tunicata of sac-like marine invertebrate filter feeders. [ 2] Ascidians are characterized by a tough outer "tunic" made of a polysaccharide . Ascidians are found all over the world, usually in shallow water with salinities over 2.5%.
The Pandoran biosphere is a fictional habitat introduced in James Cameron's 2009 science fiction film Avatar.The ecology of the lush exomoon Pandora, which teems with a biodiversity of bioluminescent species ranging from hexapodal animals to other types of exotic fauna and flora, forms a vast neural network spanning the entire lunar surface into which the Na'vi and other creatures can connect.
Although adult sponges are fundamentally sessile animals, some marine and freshwater species can move across the sea bed at speeds of 1–4 mm (0.039–0.157 in) per day, as a result of amoeba-like movements of pinacocytes and other cells. A few species can contract their whole bodies, and many can close their oscula and ostia. Juveniles drift ...
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 ...
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 ...