In detail

The Skate - Wanted Poster


Characteristics

Surname: Rays
Latin name: Batoidea
class: Cartilaginous fish
size: up to 7m
mass: up to 3000kg (Manta Rays)
Older: 5 - 20 years
Appearance: depending on the species
Sexual dimorphism: No
Nutrition typePhotos: Fish eater (piscivor)
food: Fish, crabs, shells
distribution: worldwide
original origin: unknown
Sleep-wake rhythm: day or dawn active
habitat: Seabed
natural enemies: /
sexual maturity: from the third to the fifth year of life
mating season: ?
social behavior: unknown
Threatened with extinction: Yes
Further profiles of animals can be found in the Encyclopaedia.

Interesting about the ray

  • Skates are counted among the family of cartilaginous fish and are very similar in their body shape to flatfish. Like the sharks, rays do not have a skeleton of bone but cartilage, which means that they only have a low body weight.
  • Rays are native to all temperate seas, few species live in salt, brackish, and fresh running waters in the tropical zones.
  • There are about 630 species of skates worldwide that live as shallow dwellers in shallow waters as well as in the deep sea.
  • Skates are closely related to the sharks, but they differ in body shape and type of locomotion. Their wide, wing-like pectoral fins, grown on the head, use them to move forward rather than moving by driving a caudal fin. When they swim in the water, skates look like they are floating.
  • Within the family of rays there are both small species that reach a length of only twenty centimeters as well as specimens with a body size of up to seven meters, such as the giant manta or the devil's rays.
  • Rays mainly feed on small crustaceans, clams, small fish, plankton, worms and snails, which they pick up from the ground with their mouths at the bottom of the body.
  • Their food grinds rays with multiple rows of teeth, which in the case of tooth loss in the jaw simply move forward as a substitute.
  • Their flattened body allows skates to hide in the sand at the bottom of the sea from invaders and prey by digging their fins. Since almost all of their gills are on the upper side of their body, they can breathe easily in this hidden state in the sand without dirt.
  • Through additional injection holes directly under the eyes they suck in the water and lead it to the breathing in gills.
  • By patterning the top of their body they are perfectly camouflaged in the sand on the seabed. Rays are usually inconspicuously brown or black patterned, only a few species appear in colorful shades of color.
  • Your skin is covered with tiny, rough dandruff that is built up from enamel.
  • As ovoviviparous fish, the young rays hatch from eggs hatched in the mother's body.
  • In contrast to their close relatives, the sharks, rays are hardly dangerous for humans unless they feel threatened. Only a few species, such as the stingray, can cause serious injury to people with their poison sting. In a few cases, divers were attacked by stingrays and killed by the poison.