01 Elysia viridis. West coast Anglesey and (largest) Menai Strait, Anglesey.

01 Elysia viridis. West coast Anglesey and (largest) Menai Strait, Anglesey.

Left: three greenish specimens found together on green Cladophora.
Right: two red-brown specimens associated with red algae.

The large head occupies the anterior 25% of the body. The rear 75% is flanked by large parapodial lobes which can be closed (1) over the body or opened (2).
Opaque white mark (3) on rim of parapodial lobe. Other less distinct whitish marks (4).

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