General

The Lamprey Wanted Poster


Characteristics

Surname: Lamprey
Latin name: Petromycontiforms
class: Petromyzontida
size: 25 - 80cm
mass: 150 - 700g
Older: 5 - 10 years
Appearance: eel-like shape, two eyes
Sexual dimorphism: Yes
Nutrition typePhotos: Fish eater (piscivor)
food: Blood
distribution: worldwide
original origin: unknown
Sleep-wake rhythm: nocturnal
habitat: Seas, oceans, rivers, lakes
natural enemies: ?
sexual maturity: ?
mating season: March May
oviposition: up to 200,000 eggs
social behavior: ?
Threatened with extinction: Yes
Further profiles of animals can be found in the Encyclopaedia.

Interesting about the lamprey

  • Lamprey or Petromyzontiformes describe a multi-species order of fish-like vertebrates.
  • They are considered living fossils since they have changed little in their appearance and their way of life for over 500 million years.
  • Despite their name, lampreys have only two eyes. The common name in German-speaking countries derives from the fact that in addition to the eyes they also have a nostril on each side as well as seven point-like gill slits running in a line.
  • Lamprey similar in shape to the eels and are between 25 and 80 inches long.
  • They are found in both fresh and marine waters and are home to Europe as well as Asia, Australia, New Zealand and the Americas.
  • All kinds of lampreys have their round sucking mouth together with the small horn teeth.
  • So they suck as parasitic animals to their hosts, drink their blood and grate with the tiny teeth parts of the meat out.
  • Their hosts include different species of fish as well as aquatic mammals.
  • A substance contained in their saliva prevents blood clotting in their victims.
  • All lampreys migrate to rivers and lakes to spawn.
  • The larvae are called Querder and look like little worms. They dig into the mud in slow-flowing waters at the bottom. With the head that protrudes from the ground, they filter out vegetable and animal particles from the water.
  • Only after a few years have the larvae reached a length that allows their transformation into a full-grown animal. This metamorphosis is completed within three or four weeks.
  • In the spring, the fully developed juveniles then migrate to brackish or sea water. There they live for several years as bloodsucking hunters.
  • With sexual maturity, they begin the spawning migration, which leads them back into the fresh water. From this point on, they stop eating and their digestive system returns.
  • The females lay after mating several thousand eggs in a self-dug pit and then die of exhaustion.
  • All lampreys are today as highly endangered species under nature protection. Industrial sewage is today destroying its habitat to such an extent that it is threatened with extinction in many countries.