Saturday 7 April 2012

Beadlets (Actina equina) like their personnel space

The tentacles of beadlet anemone (Actina equina) do not sting, they are just sticky. However, these anemones do have specialised stinging ‘beads’ around the base of their tentacles. These are not used for capturing food but are used to sting and repel other anemones and protect their personnel space. This is so they do not compete for food as beadlet anemones are static ‘almost’ scavengers. The pictures below show an anemone in my aquarium stinging another anemone which is become too close. They pump water into the stinging ‘beads’ and lean towards the other anemone touching it with the purple sting beads. Afterwards purple scars are left on the attacked anemones that are the same colour as the stinging beads it was stung with. Everyone needs their personnel space I guess. 

Beadlet with swollen stinging 'beads' leaning towards another beadlet

Another anemone being stung

Basal disk of a beadlet anemone

Colour varieties of beadlet anemones

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