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i)Pisces. By : Eva Adriana Muller. Pisces. The name comes from the latin plural for fish There are currently 32 000 speices of pisces. Characteristics. Kingdom of animalia Fish have eukaryotic cells The cells have cell membranes Fish cells have small vaculose

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I pisces

i)Pisces

By: Eva Adriana Muller


Pisces

Pisces

  • Thename comes fromthelatin plural forfish

  • There are currently 32 000 speices of pisces


Characteristics

Characteristics

  • Kingdom of animalia

  • Fishhaveeukaryoticcells

  • Thecellshavecellmembranes

  • Fishcellshavesmallvaculose

  • Cells do have a nucleus

  • Theyhaveprokaryoticcells

  • All the species of the fish found in the world are classified into the following three groups:

    • Agnatha - jawless fish

    • Chrondrichthyes- cartilaginous fish

    • Osteichthyes- bony fis,Ray finned group, Lobe finned group

    • They have guills


Fossil record

Fossil record

  • The first fish and the first vertebrates, were the ostracoderms, which appeared in the Cambrian Period, about 510 million years ago.

  • Ostracoderms were jawless fishes found mainly in fresh water. They were covered with a bony armor or scales and were often less than 30 cm (1 ft) long


Reproduction

Reproduction

  • Pisces reproduce sexually


I pisces

LIFE

  • A Fish’slifecycle

    • A fishs’ lifestarts as anegg

    • Thengrowsfor 1-2 years

    • Thenenterstheocean

    • There he growstomaturity

    • Thenthefishheadstosprawningareas

    • Thefishchangeform

    • Theydiposittheeggs and die

      (a fish has a lifeexpentancy of about 5-100 yearsolddependingonthespeicie)


Nervous system

Nervous system


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