A:It is impossible to estimate the total dolphin population. There are 42 species of dolphin spanning many different regions. Some species' populations are known but no one has estimated the total for all dolphins.
A:Catfish have a wide variety of predators, including snakes, raccoons, mink, otters, wading birds, alligators, crocodiles, large lizards, humans and other fish. As with most species, catfish have more predators when they are young than when they reach maturity. Some old, large catfish may effectively outgrow all of their predators except humans.
A:Birds of prey, sharks, large fish, eels and crocodiles are predators of the sea snake. Sea snakes live in shallow waters and breathe air using a long lung that also assists in buoyancy. Although the sea snake isn't aggressive, it produces some of the deadliest venom in the world.
A:There are several species of eels, which fall into the families of either freshwater or saltwater eels. The two eel families are the family Anguillidae and the family Moninguidae. Eels in the first family share a common genus and reside primarily in North America; those in the latter class generally live in tropical locales and have different body shapes.
A:Angler fish, Pacific Viperfish, Wolfish, Goblin Shark and Sloane's Viperfish are just a few of the terrifying fish lurking in the ocean's depths. Once you move past the point where light reaches, the world's oceans turn into a terrifying place filled with strange creatures.
A:Found in Arctic waters, the narwhal is related to the bottlenose dolphin, beluga, porpoise and orca. It is easily distinguishable by the sword-like spiralling tusk that grows through the upper lip of the male. The male's tusk can grow up to 8.8 feet in length although the female grows a much smaller tusk. The narwhal grows anywhere between 13 to 20 feet and weighs up to 3500 pounds.
A:Adult killer whales are top-end predators and have no need to protect themselves from natural enemies. Killer whale calves are protected by their mothers and by other members of the pods to which they belong.
A:Dolphins use echolocation for communicating with one another and for locating objects in their surrounding environments. Regardless of whether dolphins use echolocation for social purposes, such as communication, or for finding and avoiding obstacles, the mechanism of echolocation uses the same techniques. Dolphins generate beams or waves of clicking sounds, then pause to wait for a response, either from another dolphin or from an object.
A:The biggest recorded lobster ever caught weighed 44 pounds, 6 ounces and was caught in 1977. According to the Guinness Book of World Records, it was taken from the waters off the coast of Nova Scotia, and it measured 3 feet 5 inches from the tip of its largest claw to the end of its tail fan.
A:The 42 known species of dolphins live in the waters of oceans and rivers all over the world. Dolphins are found everywhere, from shallow coastal waters to the deep of the open ocean, and they migrate to and from certain areas due to water temperature and food availability.
A:The flesh of the barracuda sometimes carries the toxin ciguatera, although it is regularly eaten by humans. Symptoms of ciguatera poisoning include nausea, vomiting and diarrhea. Neurological symptoms, such as headaches, paresthesia and vertigo, often follow. Scarce treatment options exist for ciguatera poisoning, although recovery is possible in time.
A:Starfish, or sea stars, can reproduce sexually or asexually. During sexual reproduction, the male and female release sperm and eggs into the environment, resulting in fertilized free-swimming embryos. During asexual reproduction, a part of the arm and central disk detach from the parent and develop into an individual sea star.
A:There are numerous endangered species in the ocean, many of which are whales and turtles. Some notable examples are the blue whale, sperm whale, Kemp's ridley turtle and hawksbill turtle. There are also some plants listed as endangered ocean species.
A:Sand dollars eat tiny bits of organic material they find on the sea floor. Sand dollars are echinoderms, which means they have spines. They get the name "sand dollar" because their skeletons look like large coins when they wash up on the beach.
A:As of 2014, there are two remaining species of monk seal in the world: the Hawaiian monk seal and the Mediterranean monk seal, both named for the places where they live. A third species, the Caribbean monk seal, was last sighted in 1952 and is considered extinct. Monk seals are unusual in that, unlike most other seals, they prefer a warmer climate with temperate waters and sandy beaches.
A:Most commonly, the seashell is associated with love and fertility, but the meaning ascribed to seashells differs depending on the source and type of seashell. For example, medieval Christian tradition associates the seashell with pilgrims. Artists and art movements, such as practitioners of Feng Shui, also have different interpretations of the symbolism of seashells.
A:A dolphin's slimmer body, beak-like nose and curved fins distinguish it from the porpoise's stout build, rounded face and triangular fins, according to the National Ocean Service. Although they are different species, dolphins and porpoises both belong to order Cetacea. Approximately 32 dolphin species have been discovered, while only six known porpoise species exist.