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Under the Microscope: Recent filming of a live giant squid for the first time drew attention to spectacular large sea creatures. We have such a giant on our doorstep - the leatherback turtle, Latin name Dermochelys coriacea.

Normally we associate sea turtles with warm tropical seas and sandy beaches. For most types of turtle this is true, but the leatherback, the largest of all, belongs in Irish waters just as much as do the migratory birds that visit our estuaries each year.