All dolphins have conical teeth that are used for biting and trapping prey, such as crustaceans and fish, but are not used for chewing. Dolphins swallow their prey whole. Dolphins fall into the odontoceti, or "toothed whale," suborder of cetaceans, the order that includes all whales, dolphins and porpoises.Know More
Research indicates that dolphins may use their teeth as receivers for echolocation signals, a type of active sonar that cetaceans use to navigate the ocean and locate prey.
Porpoises, which closely resemble dolphins, also have teeth, but theirs are spade-like rather than conical.
There are approximately 73 species of toothed cetaceans, including the sperm whale, killer whale, bottlenose dolphin and beluga whale.Learn more about Marine Life
Cnidarians obtain food, mostly prey animals such as crustaceans and fish, by passively waiting for animals to pass by and touch their tentacles, whereupon they poison them and draw them toward their mouths to be digested. One important exception to this pattern is corals, which instead have a mutualistic relationship with algae which generate food for them via photosynthesis. Cnidarians obtain food very passively, but also have low food requirements.Full Answer >
Humpback whales do not have teeth, but instead have baleen plates with a multitude of bristles that help them to catch their prey. Spaces between the baleen bristles allow water to pass through while preventing small fish and other foods from escaping.Full Answer >
Some echinoderms eat by everting their stomachs over their prey and digesting them externally; whereas others use modified parts of their skeleton as teeth, tentacles or tube feet to direct food to their mouth opening. Echinoderms are sea animals that ingest nutrition in a variety of ways.Full Answer >
Leopard seals, as the only species of seal to prey on warm-blooded animals, eat penguins and smaller seals in addition to a more conventional diet of fish and squid. Leopard seals grow to nearly 12 feet in length and can weigh over 800 pounds.Full Answer >