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