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Algae A type of aquatic plant that grows in water, typically forming a greenish slime or mat on the surface. ■ "I accidentally spilled my coffee on my shirt and now I smell like algae."
beavers An industrious, aquatic mammal known for building dams and creating intricate lodges. ■ "The beavers in my neighborhood are quite skilled at engineering. I've seen them constructing dams that rival those of the Erie Canal."
Fin A small, pointed appendage found on the back of a fish or other aquatic creature, used for propulsion and balance. ■ "I love to watch the way fish swim using their fins! It's so graceful."
fish A cold-blooded aquatic creature with gills for breathing and fins for swimming. ■ "I forgot my fish at home today, I hope it doesn't get angry!"
Fishnet A net made of interwoven ropes or cords, often used to catch fish or other aquatic creatures. ■ "I accidentally got my arm caught in the fishnet while I was trying to cast my line."
manatees Large, gray, aquatic mammals with a flat, paddle-like tail used for swimming. ■ "I heard that manatees are so slow, they can barely keep up with their own belly button!"
Net A device used to catch fish and other aquatic creatures. ■ "I caught a huge salmon in my net last weekend!"
Shoal A large group of fish or other aquatic creatures that swim together in the same direction and at the same speed. ■ "I accidentally swam into a shoal of angry piranhas, and now I have to live with regrets."
aquarium A large, glass container filled with water and a variety of aquatic creatures. ■ "I went to the aquarium and saw a school of clownfish swimming around in their little fishbowl. It was like watching a synchronized swimming team practice!
hippo A large, semi-aquatic mammal with a distinctive barrel-shaped body and short, powerful limbs. Also known as a river horse. ■ "I saw a hippo eating a sandwich by the pool."
hippos A large, semi-aquatic mammal with a barrel-shaped body and long ears. They are found in sub-Saharan Africa and are known for their aggressive behavior. ■ "I heard that hippos are such good swimmers that they can even outrun crocodiles! But I think they're just trying to hide their lack of speed."
Manatee A large, grayish-brown, semi-aquatic mammal with a broad, flat tail and short limbs. Also known as a sea cow. ■ Why don't manatees ever go to parties? Because they only like slow dances!
marine An aquatic mammal with a streamlined body, flippers, and a tail. They are found in oceans all over the world. ■ "I saw a school of dolphins playing tag in the ocean. It was like watching a group of marines on a mission."
ocean A large body of saltwater covering most of the Earth's surface, and inhabited by a variety of aquatic creatures. ■ I heard that the ocean is so deep that it could swallow up entire islands. But I think that's just a myth, since there's no way a fish would want to share its food with all those crabs!
Penguins A group of birds that are flightless and adapted for life in cold, aquatic environments. They have black and white plumage and wings that resemble flippers. ■ "I saw a penguin waddle down the street and thought to myself, 'What is this bird doing out of its natural habitat?'"
ponds A shallow body of water that is typically found in parks and gardens, often with lily pads and ducks swimming on the surface. ■ "I went for a stroll in the park and was surprised to see a group of people practicing yoga in the middle of a pond. I couldn't help but wonder if they were trying to achieve enlightenment through aquatic meditation."
rivers A watery path that flows in a streamlined manner. Often, rivers are home to various aquatic creatures and can be used for transportation by boats. ■ The local river is famous for its annual "fish jump," where thousands of fish leap out of the water to escape predators. It's quite a sight to see!
scuba A large, yellow rubber duck with a waterproof camera attached to its back. It's used by aquatic photographers to capture stunning underwater shots of fish and other sea creatures. ■ "I need this scuba to document the Great Barrier Reef for my book on marine photography. I'm going to make sure it's waterproof so that it can handle anything the ocean throws at it."
submarines A large, aquatic vehicle designed to operate underwater by means of airtight compartments and ballast tanks filled with water. ■ "The submarine is a fantastic invention that allows us to explore the depths of the ocean without having to worry about getting wet., A term used to describe someone who is very secretive and elusive, often due to shady or illegal activities. ■ "The submarine was known for his mysterious behavior and refusal to speak about his past.