Posts tagged ‘Sea Animal’

Do fish sleep?

Fish

Yes, fish sleep.  Because fish have no eyelids, they cannot close their eyes—and it may look as though they never sleep.  Many fish sleep by simply remaining very still in the water.

Others lie on the bottom, resting upright or on their sides.  And a few others wriggle into the sand on the floor of the body of water in which they live.

In this way, fish rest their bodies as you and I do when we sleep.  If you happen to see a fish lying almost motionless in the water, it is probably asleep.  Fish don’t sleep as soundly as humans do, and the slightest disturbance will wake them.–Dick Rogers

Why do jellyfish sting?

Jellyfish

Jellyfish sting in order to get food.  A jellyfish is a simple, primitive sea animal with a jelly-like body.  It eats other small creatures of the sea.  The main part of the jellyfish’s body looks like an umbrella.

Hanging down from the umbrella are string-like tentacles. The tentacles are armed with stinging cells that contain a paralyzing poison.

When a fish or other small sea animal brushes against the jellyfish, the jellyfish paralyzes the animal with its sting.  Then the tentacles pull the victim up to the jellyfish’s mouth, which is at the bottom of the umbrella.–Dick Rogers

What is a called blooded animal?

Cold Blooded Animal

Many animals such as fish, frogs, snakes and lizards are often called “cold-blooded,” as opposed to “warm-blooded” mammals and birds.

This does not mean their blood is always cold. Unlike warm-blooded animals, they do not have built-in temperature controls that keep their bodies evenly warmed.

Instead, their body temperature is usually near that of the surrounding air or water air or water.  The cold-blooded animal is hot in hot weather, and cold in cold weather.

Many depend on the sun for their body heat. Lizards, for example bask in the sun to warm their bodies.–Dick Rogers

Why fish don’t sink?

Fish

A fish, with its bones and scales, is heavier than the water it displaces. Under normal circumstances, it would tend to sink.  But most bony fishes have a balloon-like sac inside their bodies called an “air bladder” that acts as a float to keep them from sinking.  The air bladder fills up with some of the oxygen dissolved in the fish’s blood.

Some fish, such as pike and catfish gulp air at the surface of the water to fill their air bladders.  A shark has no air bladder to buoy it up.  It must constantly be swimming in order to keep from sinking. – Dick Rogers

Is the sea anemone a plant or an animal?

When it is time to feed, the sea anemone will open up like a flower.

The sea anemone (pronounced “un NEM oh nee”) is a strange sea animal whose many graceful tentacles (tiny arms) often look like the petals of a flower.

Sea Anemone

A cluster of sea anemones looks very much like an undersea garden of brightly colored, red, purple, green, and blue blossoms.

Although sea anemones may look like harmless flowers, their touch means death to small fishes and other small sea creatures.

When a small fish happens to swim too close to the sea anemone and touch the tentacles, tiny, needle-like poisoned threads shoot out of the tentacles and sting the fish.

Then the tentacles drag the helpless prey into the sea anemone’s mouth.

The foot of the sea anemone allows it to slide about slowly on rocks.  But usually, they anchor themselves by gripping rocks, shells, or burrow into the sandy floor of the ocean.

Then a sea anemone is disturbed, it pulls its tentacles inside the body.  It then looks like a round lump on the rock. – Dick Rogers

How does an octopus eat?

Octopus

The octopus has a powerful parrot-like beak in its mouth that it uses to crack the hard shells or crass and oysters.

The octopus is a sea animal with a soft, bag-shaped body.  It gets its name from two Greek words that mean “eight feet.”  We call its eight feet “arms.”

The octopus dwells on the ocean bottom where it crawls about on its arms, searching in every crack and crevice for its favorite food of shrimp, crab, and mussels.

On each of the eight arms there are two rows of cup-like suckers which help the octopus grab and hold very tightly to anything it catches.

The arms do not squeeze and prey, but pull it toward the creature’s mouth.

An octopus has two very strong jaws that look like the beak of parrot.  It uses its jaws to crush crab shells and to tear apart the food it eats.

The long, snakelike arms and large, unwinking, strangely human eyes give it a frightening look.  Most kinds of octopus are only about as big as a man’s fist, and do not attack people.

Some however, have poisoned jaws and bites from even a small octopus. – Dick Rogers

What are fur seals?

Fur Seal

Everyone recognizes a seal as a sleek sea animal with webbed, paddle-like limbs called flippers.

Fur seals are seals that have thick coats of silky fur, such as the northern fur seal.  Northern fur seals are big.

A large bull (male) may be six feet long and weigh 500 pounds or more.

Like most kinds of seals, fur seals live in the ocean.   Seal makes its home mostly on the small islands in the Bering Sea.

In autumn the seals leave these islands and swim south, almost to the northern border of Mexico, and then return the following spring.

During the entire 5,000-mile round trip, the seals never come ashore unless injured or sick.

At one time so many fur seals were killed for their valuable fur that there was danger none would be left.  Today, the number of seals has increased because of careful management of seal hunting. – Dick Rogers