Posted on June 20, 2010 - by Denise
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The Common Blenny, otherwise known as the Shanny, or the Sea-Frog, is the fish you are most likely to encounter whilst rock-pooling. As with other rock-pool creatures, it is adapted to being both submerged by the sea and to being exposed to the air. The Blenny can breathe out of water, as long as it has a moist external layer and can be seen sitting on rocks next to a rock pool. This is where the Sea-Frog name comes from. It is sometimes seen crawling using its pectoral fins. The Blenny grows up to 16cm.
Best places in Devon to see them:
Coastal areas that contain rock pools. They are quite common, but well camouflaged and will hide in crevices.
Best time of year to see them:
They are commonly seen throughout the year.
Rock pools. They do swim further out to sea, but are thought to return to the same rock pool every time. Check that the tide is out before you go.
They have sharp teeth to be able to chew through the shells of barnacles and other molluscs. They also eat small crustaceans and carrion.
They breed in rock pools in early Spring. The male turns almost black at this time. It is the male that then guards the eggs (up to 8000 of them). The fry hatch about six weeks later.
Threats to their population:
Due to their habitat being so difficult to get to, Blenny populations are relatively undisturbed.
Wild about Devon spotting:
Burgh Island, 19/06/10, 16.00