Two fins in the water and a metre of gap between them. The giant courtship circles and breaching seen off Loop Head in late August and September, what the Irish name tells you, and the rules for sharing the water with one.

The commonest whale off the Clare coast, and the hardest to see. How to actually spot one from the cliffs, when they are here, and why they follow the mackerel.

Electric blue and orange on a Clare reef, and a life history that reads like fiction. Why the males and females look like different species, and what happens when the male disappears.