Marine Life

A:

Two characteristics that are unique to echinoderms are that they have radial symmetry and a water vascular system. Echinoderms use a hydraulic system to operate their limbs, and this system helps them eat. Examples of echinoderms that have radial symmetry are starfish and sea urchins.

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  • What color is coral?

    Q: What color is coral?

    A: Coral is a colorless marine animal that lives on the ocean floor and can be red, orange and other colors. Any color that appears to be present on coral is a buildup of algae that live on the coral. Like other animals of the sea, coral can change color with emotion.
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  • How big was the largest lobster ever recorded?

    Q: How big was the largest lobster ever recorded?

    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.
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  • What are some facts about the monk seal?

    Q: What are some facts about the monk seal?

    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.
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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 lobsters breathe?

    Q: How do lobsters breathe?

    A: Lobsters breathe through gills, which are located in a structure called the carapace. The carapace is situated at the top of the cephalothorax, which is commonly referred to as the lobster’s head. There are 20 pairs of gills that are separated into two branchial chambers inside the carapace. The gills are made up of short, fine filaments that absorb oxygen directly from the water.
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  • What do seahorses eat?

    Q: What do seahorses eat?

    A: Seahorses feed on small crustaceans. Some of the favorites for seashores are shrimp and zooplankton, though they will eat nearly any live food.
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  • What are the differences between dolphins and porpoises?

    Q: What are the differences between dolphins and porpoises?

    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.
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  • How many whales are left in the world?

    Q: How many whales are left in the world?

    A: The best estimates from the International Whaling Commission indicate that there are roughly 1.7 million whales in the world. However, it is impossible to count the number of whales or any other ocean-dwelling creature accurately, and thus, the real number of whales in the world may be significantly lower or higher than this figure.
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  • How does a whale shark protect itself?

    Q: How does a whale shark protect itself?

    A: A whale shark protects itself with its enormous size and its skin of up to 6 inches in thickness. The whale shark grows very quickly. It is a filterfeeding species of shark.
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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 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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  • 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 are the types of eels?

    Q: What are the types of eels?

    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.
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  • What are types of aquatic animals?

    Q: What are types of aquatic animals?

    A: Types of aquatic animals include marine mammals such as whales, dolphins, sea lions, seals, manatees and walruses. Other types are fish, including bony fish such as groupers and cartilaginous fish such as sharks and rays. Invertebrate aquatic animals include sponges, corals, sea stars, sea anemones, sea urchins and sea cucumbers. Other examples include sand dollars, jellyfish and colony animals such as the Portuguese man-of-war, marine worms, clams, mussels and barnacles.
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  • How do starfish reproduce?

    Q: How do starfish reproduce?

    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.
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  • What is the function of gills in crayfish?

    Q: What is the function of gills in crayfish?

    A: Crayfish use their gills to breathe. A crayfish has a gill at the base of each leg. These gills are very delicate and are covered by the crayfish's carapace, or shield. This carapace is aligned backwards from the head, allowing water to run through in a channel over the gills, which provides a continuous source of oxygen that allows the crayfish to breathe.
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  • How do killer whales protect themselves?

    Q: How do killer whales protect themselves?

    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.
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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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  • How long do crayfish live?

    Q: How long do crayfish live?

    A: According to Montana Fish, Wildlife & Parks, the average lifespan of crayfish is between two and three years. These crustaceans tend to grow to 3 or 4 inches long in Montana but have been known to grow up to 16 inches long in southern states.
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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. Most whales give birth to a single calf at a time, but several instances have been recorded in which twin calves have been born in the wild.
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  • What are the differences between sponges and cnidarians?

    Q: What are the differences between sponges and cnidarians?

    A: Cnidarians have groups of similar cells that work together as tissues, while sponges have no tissues, only disconnected regions of specialized cells. Each group has a type of cell unique to their group: Sponges have collar cells, and cnidarians have nematocysts. No sponges are capable of movement as adults, while some cnidarians move as adults.
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