|General Information||Taxonomy and identification||General biology||Habitat preferences and distribution||Reproduction and longevity||Sensitivity||Importance|
Image Keith Hiscock - Clavelina lepadiformis. Image width ca 5 cm.
Image copyright information
Clavelina lepadiformis is not listed under any importance categories.
|Researched by:||Karen Riley||Refereed by:||Dr Xavier Turon|
|Phylum||Chordata||Sea squirts, fish, reptiles, birds and mammals|
|Recorded distribution in Britain and Ireland||Clavelina lepadiformis occurs around most coasts of Britain and Ireland.|
|Habitat information||Clavelina lepadiformis attaches itself to rocks, stones and seaweed in the sublittoral, to a depth of about 50 m.|
|Description||Clavelina lepadiformis is a colonial sea squirt that grows up to 20 mm high. Groups of transparent zooids are joined at the base by short stolons. Eggs and larvae vary in colour and are visible in the atrial cavity. In the Mediterranean the eggs and embryos are most often yellowish white and sometime pink (X. Turon, pers. comm.) although in other areas in NW Europe they can also be red (Fish & Fish, 1996). Zooids possess a white ring around the pharynx, and have pale yellow or white longitudinal lines along the endostyle and dorsal lamina, which gives this species its 'light-bulb' appearance. In some areas colonies regress in winter and re-grow in spring although in the Mediterranean this may not be the case. De Caralt et al. (2002) looked at the differences in Clavelina lepadiformis between populations inside and outside of harbours and found that the population inside the harbour remained all year (albeit often at very low abundances). In contrast, the population in a rocky littoral area outside the harbour aestivated (regressed) for up to 7 months over the summer period (De Caralt et al., 2002).|
This review can be cited as follows:
Karen Riley 2008. Clavelina lepadiformis. Light bulb sea squirt. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 24/05/2013]. Available from: <http://www.marlin.ac.uk/speciesfullreview.php?speciesID=3009>