All definitions are taken directly from www.dictionary.com
Blowhole: An opening or one of a pair of openings for breathing, located on the top of the head of cetaceans, such as whales and dolphins.
Blubber: a layer of fat under the skin of sea animals
Calve: the plural of calf. A calf is the baby of a seal elephant or whale.
Echolocation: the process of using sounds and echoes to locate objects
Estuaries: the mouth of a river where its current meets the sea and is affected by the tides.
Fascinating- To hold interest or attraction for.
Fluke: a part of a whale's tail
Inhabit: to live in or on.
Migrate: to move from one place to another.
Pod: a group animals.
Polyps- having a cylindrical body and an oral opening usually surrounded by tentacles.
Predators- An Organism that lives by preying on other organisms.
Suction cups-A cupped-shaped device designed to adhere to a flat surface by means of suction found on the underside of the octopi tentacles.