Leathery sea squirt, Styela clava


Short description of Styela clava, Leathery sea squirt

A brown, non-colonial (unitary or ‘solitary’) sea squirt up to 20 cm tall, attached by a small flat holdfast at the base of a narrow stalk, and with two siphons close together at the free end.  The surface is tough and leathery, with folds and swellings.  The siphons show dark brown stripes when open.

Description of Styela clava, Leathery sea squirt status in GB

The leathery sea squirt is established from the Clyde (Scotland) around south coast of England to the Humber, the northern limits appearing relatively stable.

Habitat summary: Styela clava, Leathery sea squirt

Attached to solid surfaces in shallow water, especially in harbours and marinas but also on wrecks and natural rock bottoms.

Overview table

Environment: Marine
Species status: Non-Native
Native range: Northwestern Pacific
Functional type: Filter-feeder
Status in England: Non-Native
Status in Scotland: Non-Native
Status in Wales: Non-Native
Location of first record: Plymouth
Date of first record: 1953

Distribution map

GB Distribution from NBN Atlas

Author's name:

John Bishop

Last updated:

October 3rd 2019

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