Copepods vary considerably, but are typically 1 to 2 mm (1 ⁄ 32 to 3 ⁄ 32 in) long, with a teardrop-shaped body and large antennae.Like other crustaceans, they have an armoured exoskeleton, but they are so small that in most species, this thin armour and the entire body is almost totally transparent.Some polar copepods reach 1 cm (1 ⁄ 2 in). Most copepods have a single median …

Cyclops is one of the most common genera of freshwater copepods, comprising over 400 species. Together with other similar-sized non-copepod fresh-water crustaceans, especially cladocera, they are commonly called water fleas.The name Cyclops comes from the Cyclops of Greek mythology, as they have a single large eye; in Cyclops, the eye may be either red or black.

Luciferase is a generic term for the class of oxidative enzymes that produce bioluminescence, and is usually distinguished from a photoprotein.The name was first used by Raphaël Dubois who invented the words luciferin and luciferase, for the and enzyme, respectively. Both words are derived from the Latin word lucifer, meaning "lightbearer", which in turn is derived from the …

Los copépodos (Copepoda, del griego «cope», remo, y «poda», pata) son una clase de crustáceos [1] de pequeño tamaño, muy extendidos por todo el planeta, principalmente formando parte del zooplancton, aunque también es posible encontrar especies semiterrestres.Existen especies adaptadas a casi todo tipo de ambientes acuáticos (dulce, salobre, salada, aguas …

Dracunculus medinensis, or Guinea worm, is a nematode that causes dracunculiasis, also known as guinea worm disease. The disease is caused by the female which, at up to 80 centimetres (31 inches) in length, is among the longest nematodes infecting humans. In contrast, the longest recorded male Guinea worm is only 4 cm (1 + 1 ⁄ 2 in).. Guinea worm is on target to …

Mangrove forests, also called mangrove swamps, mangrove thickets or mangals, are productive wetlands that occur in coastal intertidal zones. Mangrove forests grow mainly at tropical and subtropical latitudes because mangrove trees cannot withstand freezing temperatures. There are about 80 different species of mangrove trees.

Plankton and Karen are the married owners of the unsuccessful Chum Bucket restaurant. Plankton is an intellectual planktonic copepod and Karen is a waterproof supercomputer. Plankton shares a rivalry with Mr. Krabs, who owns the far more profitable Krusty Krab restaurant and sells a fictional burger called the Krabby Patty. Plankton and Karen ...

Parasitism is a close relationship between species, where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The entomologist E. O. Wilson has characterised parasites as "predators that eat prey in units of less than one". Parasites include single-celled protozoans such as the agents of malaria ...

History of the study of crustacean larva. Antonie van Leeuwenhoek was the first person to observe the difference between larval crustaceans and the adults when he watched the eggs of Cyclops hatching in 1699. Despite this, and other observations over the following decades, there was controversy among scientists about whether or not metamorphosis occurred in …

The winghead shark (Eusphyra blochii) is a species of hammerhead shark, and part of the family Sphyrnidae. Reaching a length of 1.9 m (6.2 ft), this small brown to gray shark has a slender body with a tall, sickle-shaped first dorsal fin.Its name comes from its exceptionally large "hammer", or cephalofoil, which can be as wide as half of the shark's total length.