ANIMALS

Fish

Introducing fish:

  • the fish are defined as aquatic vertebrates,as they contain gills.
  • clans between 10 mm and 20 meters in length.
  • their weight ranges from 1.5 kg to several thousand kilograms.

Characteristics of fish:

  • differ in their types shapes and sizes.
  • they all share some Characteristics that help them grow in their aquatic environment.

Their two tupes of fish:

  1. Predatory fish.
  2. Pet fish.

Predatory fish

  • sharks
    • Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton,
    • five to seven gill slits on the sides of the head,and pectoral fins that are not fused to the head.
    • Modern sharks are classified within the clade selachimorpha(or selachii)and are the sister group to the rays.
    • However,the term "shark" has also been (incorrectly)used to refer to extinct members of the subclass Elasmobranchii.
    • which are technically outside the selachimorpha clade.Notable examples of improper classification include Cladosselache,
    • Xenacanthus,and various other members of the Chondrichthyes class like the holocephalid eugenedont idans.
shark shark
  • Vampire fish
    • Vampire fish there is a species of this species in the amazon river and it is 1.20 meters long.
    • Weighs more than 18 kilograms.
    • Vampire fish is famous for being the most common and wide in the water.
    • Preying on a large quantity that may weight half its size.
vampire fish vampire fish vampire fish vampire fish