Just like the land, oceans change with the seasons. Most of these changes go unnoticed, since so much of our interaction with the water is at the surface level. As the seasons change, different species come and go. The Blue Shark appears off the west coast of Ireland during the summer, feeding in the rich waters as it passes through. Most of our experiences with the ocean are inherently at the surface, and it's a worthy adventure to dive deeper and see what's happening beneath what the eye can see.