Ahoy there, giants of the sea! World Whale Day is surfacing, along with these sperm whales off the coast of the Caribbean island of Dominica. Established in 1980 in Maui, the day originally aimed to celebrate the humpback whales in Hawaiian waters but has evolved into a global event for all 92 whale species.

In the world of whales, you're either baleen or toothed. Baleen whales use bristle-like plates in their mouths to filter krill from the water. The sperm whales pictured here are toothed whales, which use cone-shaped teeth to attack their prey. Unlike baleen whales, they hunt and navigate using echolocation, using sound to detect objects around them. Sperm whales also happen to have the largest brain of any animal on Earth.