ARCHIDORIS PSEUDOARGUS. Scuba diving Ireland

Archidoris pseudoargus (sea lemon) is one of our largest nudibranchs. Up to 120mm in length. Its colour is usually mustard yellow, with patches in shades of brown, yellow, green or violet although it varies with habitat and is thought to be a method of camouflage. Recorded on the west coast of Ireland. Thanks for watching.

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