MCS logo, two figures in silhouette - a dolphin jumping, superimposed by a diving human, with the slogan 'Seas fit for life'.

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Photographs of a group of light-bulb sea squirts, Clavelina lepadiformis (Müller). Top right: by Gordon Fletcher, bottom right: by Ron Crosby.

While these animals usually live in small groups, each individual is distinct, unlike the football sea squirt, in which individuals are joined at the base.

This is one of the first ascidians a novice diver will spot, the edges of the siphons and digestive organs are reflective within an almost transparent body, making them look like the filament in a light-bulb. As a consequence these organisms stand out from their environment - as is clearly depicted in Ron's photograph (bottom).

  Photo of light-bulb sea squirts.
Photo of light-bulb sea squirts.

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