(Doris pseudoargus)
Sea Lemons can often be seen under the Ferrybridge at Portland. The ones in the photographs were seen earlier this week. They can grow to 12cm and are covered in bumpy tubercles. It lays thousands of eggs in a long orange or white ribbon.
The sea lemon is common on the UK coast line, they Feeds on sponges in particular bread-crumb sponge.
Sea Lemon under the Ferrybridge in the Fleet Lagoon
Ribbons of orange eggs laid by the Sea Lemon