Marine Life

A:

According to PBS, the average life span of a shark is 25 years. Life expectancy can vary among shark species. Sharks tend to live much longer in the wild than in captivity.

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  • What is the defense mechanism of the sea cucumber?

    Q: What is the defense mechanism of the sea cucumber?

    A: Sea cucumbers expel their internal organs through their anus to distract and ward off predators. They also evacuate their organs on a seasonal basis, regenerating them afterwards. In addition, some sea cucumbers have special, sticky tubules, part of their respiratory system, which they spew at predators.
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  • Are lobsters related to cockroaches?

    Q: Are lobsters related to cockroaches?

    A: Both lobsters and cockroaches are arthropods, making them distant relatives. An arthropod is a member of the phylum Arthropoda, which includes insects, crustaceans and arachnids. Arthropods are characterized by a jointed exoskeleton composed of chitin, a segmented body and jointed appendages.
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  • How long do clams live?

    Q: How long do clams live?

    A: Of the 15,000 species of bivalves known as clams, some have life cycles of only one year. Individuals of one species called the ocean quahog, or Arctica islandica, however, are among the oldest living animals on Earth, with one captured specimen measured to be more than 500 years of age.
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  • What are the adaptations of dolphins?

    Q: What are the adaptations of dolphins?

    A: Among the adaptations of dolphins are hydrodynamic bodies, blowholes on top of their heads, flippers and flukes and echolocation. Some scientists believe that dolphins are able to enjoy the benefits of sleep even while they're in the water by having one half of their brains alert and the other shut down.
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  • Why do seashells sound like the ocean?

    Q: Why do seashells sound like the ocean?

    A: When you put a seashell to your ear you are not hearing the ocean, you are hearing the ambient noise coming from inside your ear and around you. The seashell captures and amplifies the noise, which resonates inside the shell and sounds like the rolling waves of the ocean. This effect is called seashell resonance.
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  • Where do dolphins live?

    Q: Where do dolphins live?

    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.
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  • What do sea sponges eat?

    Q: What do sea sponges eat?

    A: Most sea sponges are detrivorous, meaning they consume organic debris and various microbes that drift through ocean currents. Harp sponges, however, are carnivorous and use hooks located on their arms to catch shrimp and other small animals.
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  • What is the symbolism of seashells?

    Q: What is the symbolism of seashells?

    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.
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  • What is the biggest animal in the ocean?

    Q: What is the biggest animal in the ocean?

    A: The biggest animal in the ocean, and possibly the largest animal ever to live on Earth, is the blue whale. The maximum recorded weight for a 98-foot blue whale exceeded 209 tons. Longer whales, up to 110 feet, have been seen but not weighed.
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  • How do crayfish protect themselves?

    Q: How do crayfish protect themselves?

    A: Crayfish, which are freshwater crustaceans closely related to lobsters, have large claws with which they threaten predators and protect themselves. In addition, when crayfish are frightened, they make menacing gestures with their claws, propel themselves backwards and use their tails to throw mud at their enemies.
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  • Why do whales and dolphins beach themselves?

    Q: Why do whales and dolphins beach themselves?

    A: Whales and dolphins beach themselves, or end up beached, for reasons ranging from injury and illness to polluted water and simply becoming stranded at low tide. When these creatures travel in pods, the entire pod is likely to end up beached if the leader accidentally strands itself on shore, explains Mental Floss.
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  • What do sand dollars eat?

    Q: What do sand dollars eat?

    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.
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  • How much food does a baby seahorse eat a day?

    Q: How much food does a baby seahorse eat a day?

    A: Like adult seahorses, seahorse babies, which are also known as fry, eat a lot of food in a single day; these tiny creatures can eat as much as 3,000 pieces of food a day. As adults, seahorses will typically eat on no fewer than 30 occasions per day, with as many as 50 eating episodes taking place in a 24-hour period. This voracious appetite is related to the fact that the seahorse has no stomach and has a digestive system that has been described as inefficient, meaning this sea creature must eat a lot in order to stay properly nourished.
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  • What is a baby whale called?

    Q: What is a baby whale called?

    A: A baby whale is called a calf, its mother is a cow and its father is a bull. Because whales are mammals, they give birth to their live babies and nurse them in infancy. A calf lives in the mother's uterus during gestation and is fed through an umbilical cord.
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  • How many pounds does a baby blue whale gain during its first day after birth?

    Q: How many pounds does a baby blue whale gain during its first day after birth?

    A: A baby blue whale gains about 200 pounds during its first day after birth. In fact, the young whale maintains this daily weight gain throughout its entire first year of life by feeding exclusively on its mother's milk. Each day the newborn also grows about one inch longer.
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  • What is a group of stingrays called?

    Q: What is a group of stingrays called?

    A: A group of stingrays is called a fever. Stingrays normally travel in groups to hunt but are also known to travel individually and in pairs.
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  • What is a group of whales called?

    Q: What is a group of whales called?

    A: A group of whales is usually called a pod, but other terms for a group of whales include a gam, a herd or a school. A pod usually includes whales that are either related to each other or whales that have formed friendships with each other. Pods are made up of anywhere from two to 30 whales or more.
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  • What is the difference between a colossal squid vs. a giant squid?

    Q: What is the difference between a colossal squid vs. a giant squid?

    A: The main difference between a colossal squid and a giant squid is size. The colossal squid's body is larger than the giant squid's, but the colossal squid has shorter tentacles. Colossal squids can grow to more than 1,000 pounds, while giant squids only reach about 600. Colossal squids also have larger beaks than giant squids, and their limbs have sharp hooks that swivel.
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  • What are some tips for seashell identification?

    Q: What are some tips for seashell identification?

    A: Seashells can often be identified by their shape, size, color and habitat, but since there are at least 100,000 species of mollusks, a printed or online identification guide can help. Seashell identification guides provide photographs for comparison, taxonomic details and clues to help differentiate between similar species.
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  • What do bottle nose dolphins eat?

    Q: What do bottle nose dolphins eat?

    A: Coastal bottlenose dolphins prefer bottom-dwelling fish and invertebrates, while offshore dolphins eat a variety of fish and squid. More ingenious feeders have been known to trail fishing boats, in the hopes of snagging some leftovers.
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  • What color are starfish?

    Q: What color are starfish?

    A: Starfish color varies depending on the species and even the presence or absence of environmental threats — most species have the ability to change color, via camouflage, to match their surroundings. Some starfish are naturally tan and dark brown, while others may be light pink or crimson red.
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