A measurement of weight that is equal to 1,000 kilograms. It would take about 12-15 regular adults to weigh as much as a tonne!

Free floating ocean creatures that look very similar to jellyfish.

A huge whale with a large head that has a section in it which contains oil. Sperm whales used to be hunted for this oil, which was used to make candles and ointments (e.g. medicine). Sperm whales can hold their breath for up to an hour, and feed on squid, octopus, and fish deep in the ocean.

Relating to or found in the ocean.

A dolphin’s pointy mouth is usually called a 'snout' but can also be called a beak. A beak is also the name for a bird's projecting jaws.

Echolocation is a process for locating distant objects by sending out sound waves which are then reflected back to the sender.