In Great Bernera, sea life is especially rich where there is tidal run between the Caolas Bhalasaigh (English: Valasay Straits/Kyles) and the inner sea-loch of Tòb Bhalasaigh. There are numerous molluscs, sponges, brittlestars and starfish, the latter growing noticeably larger in size than normal. Cup coral, snakelocks anemone and dead man's fingers coral, may also be found here. Common fish include shanny and butterfish and Atlantic and common seals are regular off-shore visitors.