Information

The dogfish - Wanted poster


Characteristics

Surname: Catshark
Other names:
Latin name: Scyliorhinidae
class: Fishes
size: up to 2 m (depending on the species)
mass: 1 - 5 kg (depending on species)
Older: 6 - 8 years
AppearanceSpotted, dabbed or striped skin possible
Sexual dimorphism: Yes
Nutrition type: preferably fish eater (piscivor)
food: Fish, octopuses, crabs, squid
distribution: worldwide
original origin: unknown
Sleep-wake rhythm: nocturnal
habitat: Sea and ocean
natural enemies: Predatory fish
sexual maturity: depending on the species
mating season: art and place
social behavior: Loner or swarming
Threatened with extinction: No
Further profiles of animals can be found in the Encyclopaedia.

Interesting facts about the dogfish

  • The cat sharks or Scyliorhinidae describe a family within the basal sharks, which includes over sixty species worldwide.
  • Catsharks are native to all oceans except the polar oceans and, depending on the species, can be found in shallow coastal waters as well as in the deep sea.
  • They are ground dwellers who capture small fish, octopus, cuttlefish, crabs, shrimp, worms and snails at the bottom of the sea. Many species are nocturnal predators.
  • Common to all cat sharks are the eponymous eyes that, through their elongated and narrow pupils, are reminiscent of those of the cats. The nictitating skin, which closes the eyes from below, is a clear identifying feature of all cat sharks.
  • Cat sharks become up to one and a half or two meters long depending on the species and have a slim, wedge-shaped and elongated physique. The flat and remarkably long dorsal fin is far behind in all species. Many cat sharks have spotted, dabbed or striped skin.
  • In Europe, the spotted dogfish or Scyliorhinus canicula is widespread. It occurs in shallow regions both in the Mediterranean Sea, the North Sea and in the waters around Great Britain at depths of up to 150 meters as well as along the coasts of North Africa.
  • It reaches a body length of no more than eighty centimeters and a weight of about one and a half kilograms.
  • Its brownish body is covered by tiny hard scales, the top shows small spots.
  • The Great-spotted dogfish, which can be almost twice as long, is native to the Mediterranean and Atlantic along the coasts of North Africa and Europe, where it lives at depths of up to sixty meters. In contrast to the spotted dogfish he shows a pattern that is characterized by striking dark large spots on a light surface.
  • Catsharks live mostly solitary, but occasionally join together to small same-sex swarms.
  • The propagation of cat sharks is done by an internal fertilization of the eggs in the body of the female.
  • After mating, the female releases the fertilized eggs one at a time, one at a time, by stripping them off from kelp or other plants in oxygen-rich water with good flow.
  • Spirally growing threads on the egg capsule ensure that the egg is well attached to the substrate.
  • The development of the embryo takes several months. The fully developed kittens go hunting soon after hatching.
  • The life expectancy of cat sharks is about eight years.