Dolphins grow to different sizes, with the bottlenose dolphin growing to be approximately 10 to 14 feet and weighing 1,100 lbs. while the orca whale grows to approximately 21 to 23 feet long and weights in at 6 to 10 tons. The orca whale is actually a dolphin and not a member of the whale family, reports Defenders of Wildlife.
When people think of dolphins, the bottlenose dolphin is usually the dolphin that comes to mind. These dolphins are known for their appearances in aquarium shows, such as SeaWorld, and for their friendly nature in the wild. They will often swim up to humans and interact with them without threatening them. In fact, bottlenose dolphins have been known to protect humans from sharks.
Bottlenose dolphins can jump as high as 16 feet in the air and can communicate underwater with their fellow dolphins through echolocation. Echolocation is the use of clicking sounds that can be heard underwater. The sound is made by one dolphin and is sent out to the others. These dolphins then interpret the sound to determine the dolphin that sent it and the location of that dolphin.
Dolphins are highly intelligent and social animals who live in pods. They are also fantastic swimmers and can swim as much as 18 miles per hour, reports National Geographic.Learn More
Gray whales eat a wide variety of crustaceans, such as ghost shrimp and amphipods, along with many other organisms, including polychaete worms, herring eggs and animal larvae. They feed off the ocean bottom, sucking in a large amount of sediment, then forcing it out through their baleen plates. Food items are trapped in baleen filters and are scraped off by the whales' tongues to be digested.Full Answer >
Killer whales sleep by floating motionlessly in the water for a period of 5 to 8 hours. Captive orcas may sleep by resting on the bottom of the pool or floating near the surface.Full Answer >
Killer whales and sharks eat sea lions. Although sea lions swim faster than both predators, killer whales and sharks are often able to surprise them before they can escape.Full Answer >
Depending on the species, sharks either lay eggs or give birth to live young. Sharks that lay eggs are oviparous, and sharks that give birth to live young are viviparous. Viviparous sharks are further divided into placental and aplacental categories, meaning the shark pups either have a placenta or not.Full Answer >