User:Pooja srivastava/E-Museum/Coelentrata/Some Common Examples/Some Common Examples

Metridium

SCIENTIFIC NAME-

Metridium

COMMON NAME-

Sea anemone or Plumose anemons

DISTRIBUTION-

Found on the Atlantic Coast, Northen Pacific coast and Europe.

HABITAT-

It is marine in nature and found attached to the rocks and solid objects from tide pools to a depth of 90 fathoms.

IDENTIFYING FEATURES-

• Body is cylindrical and divisiblle into 3 distinct reagions, pedal disc, column and oral disc.
• The body size may vary from few centimeters to 1 meter.
  
• Pedal disc (foot) helps in attachment with substratum.
• Column is diffrentiated into two portions-Capitulum(thin walled ) and Scapus(thick walled).The wall of scapus is perforated by small openings called cinclides.
• Mouth is surrounded by numeros tentacles.

GENERAL CHARACTERS-

• Mouth opens into gastrovascular cavity via a short gullet.
• Sea anemones are predaceous, immobilizing their prey with the aid of specialized stinging cells called nematocysts.
  
• Sea anemones feed on small planktons.
  
• Sexes are separate.Gonads are present on mesentries.