Marine Mammals

A:

The bottlenose dolphin reproduces through sexual copulation. The gestation period is 12 months. While twins do occur in bottlenose dolphin births, single calves are the most common. A calf remains with its mother from 18 months to 8 years following its birth.

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  • Why do whales jump out of the water?

    Q: Why do whales jump out of the water?

    A: While scientists do not know for certain, there are several theories as to why whales jump out of the water. Common suggestions for the behavior include the attempt to communicate or an act of courtship. Humpbacks are known best for this behavior, which is known as "breaching."
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  • What is the habitat of a manatee?

    Q: What is the habitat of a manatee?

    A: Sometimes called a sea cow, manatees live in the warm waters of bays, rivers, estuaries and coastal waters. They are graceful and gentle mammals that have been known to reside in the North American east coast, the Amazon River and in the rivers at the west coast of Africa.
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  • What climates do dolphins live in?

    Q: What climates do dolphins live in?

    A: Forty species of dolphins live in varied climates, from the arctic, which is inhabited by killer whales, to the Caribbean, which is preferred by bottlenose dolphins. Even the Amazon River basin is home to several dolphins, including the endangered finless porpoise, according to Whale Facts.
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  • How big are dolphins when they are born?

    Q: How big are dolphins when they are born?

    A: Baby dolphins, or calves, are approximately 3.8 feet long and weigh around 40 pounds. Baby dolphins gestate for a period between 9 and 17 months, depending on the species. Calves are born live in shallow water and quickly taken to the surface for their first breath.
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  • Where do killer whales live?

    Q: Where do killer whales live?

    A: Killer whales live mostly in cool coastal waters. However, they can be found in most oceans across the globe. The least likely area to find them is in the middle of open warm areas, such as the Pacific Ocean.
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  • What is a baby sea lion called?

    Q: What is a baby sea lion called?

    A: A baby sea lion is called a pup. When born, pups are usually about 2.5 feet long and weigh between 13 and 20 pounds, but can weigh as much as 50 pounds.
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  • What do you call a baby whale?

    Q: What do you call a baby whale?

    A: A baby whale is a calf, his mother is a cow and his father is a bull, and together, the family is a pod. Baby whales grow in the mother's uterus from 10 to 18 months, depending on the species. A calf receives nutrients in utero through an umbilical cord.
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  • In which ocean zone do dolphins live?

    Q: In which ocean zone do dolphins live?

    A: According to EnchantedLearning.com, dolphins live in what is known as the euphotic zone, which is sometimes referred to as the sunlit zone — part of the continental shelf that extends down to depths of anywhere from 50 to 660 feet. This zone is so named because it is lit by the sun for at least part of the day.
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  • How long can dolphins hold their breath?

    Q: How long can dolphins hold their breath?

    A: According to the Institute for Marine Mammal studies, dolphins can generally hold their breath for as long as 10 minutes. They normally breathe about four to five times per minute.
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  • What adaptations do walruses have?

    Q: What adaptations do walruses have?

    A: The most prominent adaptations of walruses are their tusks, which they use for many purposes. Other adaptations include sensitive whiskers, which help them locate food, and the blubber under their thick skins, which provides energy and protects them against the arctic cold.
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  • Where do harp seals live?

    Q: Where do harp seals live?

    A: According to the National Oceanic and Atmospheric Administration, harp seals live in the waters surrounding the North Atlantic and Arctic Oceans and can be found between Newfoundland and Northern Russia. The entire harp seal population is distributed into three groups, and each group has its own breeding site.
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  • How long can a whale hold its breath?

    Q: How long can a whale hold its breath?

    A: Although the amount of time that a whale can hold its breath varies by species, the beaked whale can hold its breath for up to 2 hours. The sperm whale can hold its breath for up to 90 minutes.
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  • Are penguins mammals?

    Q: Are penguins mammals?

    A: Penguins are not mammals, even though they are warm-blooded animals. Penguins are one of only a few species of flightless birds left in the world. Many people mistakenly believe penguins have fur instead of feathers because of the extremely tight packing of the feathers on their bodies.
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  • What eats whales?

    Q: What eats whales?

    A: Killer whales, sharks and false killer whales eat whales. False killer whales and killer whales may hunt whales in packs. Humans are largely considered to be the primary predator of whales.
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  • How do manatees nurse their young?

    Q: How do manatees nurse their young?

    A: Manatees are large aquatic mammals that nurse their young with a nipple that is located underneath the female manatee's flippers on each side of the body; though these are mammals that breathe air, the calf nurses while submerged. Baby manatees, which are known as calves, will nurse very shortly after birth and will continue nursing for the duration of the time they spend with their mother, which is typically about a year. Though manatee calves nurse for a relatively long period, they also begin eating plants while still nursing, which typically happens when they are a few weeks old.
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  • Are whales herbivores?

    Q: Are whales herbivores?

    A: Whales are carnivores, not herbivores. Herbivores have strictly plant-based diets, while carnivores consume meat. A whale's typical diet includes octopus, fish, shrimp, krill and squid, making these mammals carnivores. A blue whale can consume 4 tons of krill daily.
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  • What is a killer whale's niche?

    Q: What is a killer whale's niche?

    A: The killer whale's niche is at the top of the ocean's food chain. Killer whales inhabit most oceans and are predators that have been known to attack other marine animals, such as sharks.
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  • What do whale sharks eat?

    Q: What do whale sharks eat?

    A: Whale sharks are filter feeders, which means that they eat massive amounts of tiny crustaceans, plankton and other small organisms. They have specialized passive filter structures in their mouths that allow sea water to pass through and strain out food matter.
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  • What does the inside of a whale look like?

    Q: What does the inside of a whale look like?

    A: Whales are not fish, but mammals, and the inside of a whale looks similar to that of a land mammal. They have skeletons with long backbones, circulatory systems similar to warm-blooded animals, large hearts and lungs, large teeth and inner ears that are adapted to hear underwater. To provide buoyancy, store energy and insulate them against cold temperatures, whales have a layer of blubber under their skin.
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  • What are some facts about sea otters?

    Q: What are some facts about sea otters?

    A: Sea otters are mammals that belong to the weasel family, have the densest fur of all animals and are a keystone species. As a keystone species, the sea otter is critical for the health and well-being of a great number of other species. They are the heaviest weasels and the second smallest marine mammals.
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  • How long have whales been on Earth?

    Q: How long have whales been on Earth?

    A: Fossil records show that the first whales lived approximately 50 million years ago, according to Encyclopedia Britannica. Primitive whales, belonging to the extinct suborder Archaeoceti, had features in common with land mammals and were the ancestors of today's baleen and toothed whales.
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