The animals commonly known as sea pigs are in fact a type of sea cucumber. Sea cucumbers are echinoderms, a group of marine animals that includes sea urchins and starfish. Sea pigs are found in all the world's oceans.
Sea spidersalso called Pantopoda or pycnogonids'pycno-' closely packed, 'gonid' gonidia are marine arthropods of class Pycnogonida. Although "sea spiders" are not true spidersor even arachnidstheir traditional classification as chelicerates would place them closer to true spiders than to other well-known arthropod groups, such as insects or crustaceans. This is in dispute, however, as genetic evidence suggests they may be the sister group to all other living arthropods.
Insects are part of an animal group known as 'arthropods'. Arthropods are known as such in that they utilize hard protective exterior cases known as an 'exoskeleton'. Arthropods contain a host of well-known multi-legged creatures including arachnids spidersmillipedes and crustaceans ocean lobsters and crabs.
But, believe it or not, all of these animals can be found right here on planet Earth! Check out these 9 sea creatures who are out of this world! They like shallow water, but they can sometimes be found on ocean floors up to 9 km below the surface of the water! The glaucus atlanticusaka.
Boil them, deep-freeze them, crush them, dry them out or blast them into space: tardigrades will survive it all and come back for more. The lack of pressure would force the air in your lungs to rush out. Gases dissolved in your body fluids would expand, pushing the skin apart and forcing it to inflate like a balloon.
Starfish or sea stars are beautiful marine animals found in a variety of colors, shapes, and sizes. All starfish resemble stars, and though the most common have only five arms, some of these animals can grow up to 40 arms. The amazing sea creatures—part of a group of animals known as echinoderms—travel using their tube feet.
Sea spideralso called Pycnogonidany of the spiderlike marine animals comprising the class Pycnogonida also called Pantopoda of the phylum Arthropoda. Sea spiders walk about on the ocean bottom on their slender legs or crawl among plants and animals; some may tread water. Most pycnogonids have four pairs of long legs attached to four trunk segments.
By Susan Milius. May 10, at pm. A survey of fish species reveals that four from the deep sea had a surprising number of genes for light-sensitive eye proteins called rod opsins, researchers report in the May 10 Science.
The skyward gaze of one set of eyes belonging to box jellyfish provides evidence that these creatures -- which lack a conventional brain -- are capable of sophisticated behavior. New research has shown that one species of jellyfish uses one set of eyes to navigate and keep itself close to home. Box jellyfish have 24 eyes of four different types, and two of them -- the upper and lower lens eyes -- can form images and resemble the eyes of vertebrates like humans.
To truly appreciate the wondrous beauty of life in the ocean, you have to see it at night. When the sun sets, it comes to life in a dazzling display of colors and lights that rivals the best fireworks shows. An astonishing variety of species use bioluminescence the natural production of visible light through a chemical reaction to catch food, hook up with mates, or scare off intruders. In this gallery, we'll look at some of the wildest, and most clever, uses of light at sea.