Fish

A:

While fish near the surface may die when lightning strikes the water, the fish that are deep underwater are likely to survive. Lightning strikes the surface of the water, but its electricity is neutralized deeper down.

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  • How many fish are in the sea?

    Q: How many fish are in the sea?

    A: While there is no way to know how many fish are in the sea, the number of fish species in the world's oceans, seas and other bodies of water is estimated to be between 27,300 and 32,000 total as of 2014. This number includes both freshwater and saltwater fish.
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  • Do all fish lay eggs?

    Q: Do all fish lay eggs?

    A: While many fish species are oviparous, not all are; some fish species are ovoviviparous, meaning that eggs are gestated and hatched inside of the female fish's body and fish fry (babies) are born live. These live-birthing fish are commonly known as livebearers.
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  • How do fish breathe under water?

    Q: How do fish breathe under water?

    A: Fish use their gills to breathe by extracting oxygen from the surrounding water. The oxygen that fish and other animals with gills use is bonded to hydrogen molecules and is dissolved in the water. Water molecules are composed of two parts hydrogen and one part oxygen.
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  • What is a dwarf lionfish?

    Q: What is a dwarf lionfish?

    A: The fuzzy dwarf lionfish is a species of the Scorpaenidae family native to the waters of Africa and Indonesia. A popular aquarium fish, it bears red, white and black vertical stripes and is named for the fullness of its tall, quill-like dorsal fins and fan-like pectoral fins.
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  • What is a green puffer fish?

    Q: What is a green puffer fish?

    A: The green spotted puffer, Tetraodon nigroviridis, is a colorful species of the Tetraodontidae family native to South and southeast Asia. The fish is named for its rich green coloration at the top with dark spots and white underbelly.
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  • How are fish adapted to water?

    Q: How are fish adapted to water?

    A: Fish have adapted to their environment through the evolution of gills, swim bladders and fins. Gills allow fish to absorb oxygen from the water, swim bladders allow fish to maintain an appropriate level of buoyancy and fins allow the fish to move through the water. Different species exhibit specializations of these features to thrive in their own way.
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  • How many fish years equal one human year?

    Q: How many fish years equal one human year?

    A: One year in a goldfish's life is equal to five human years, which means one-fifth of a fish year equals one human year. The average lifespan of the common goldfish is 15 years, while exotic goldfish species may live for only eight to 10 years.
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  • Do fish die when lightning strikes the water?

    Q: Do fish die when lightning strikes the water?

    A: While fish near the surface may die when lightning strikes the water, the fish that are deep underwater are likely to survive. Lightning strikes the surface of the water, but its electricity is neutralized deeper down.
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  • What are baby fish called?

    Q: What are baby fish called?

    A: Baby fish are initially called larvae, then fry and finally fingerlings before they mature into adult fish. Larvae are totally dependent on their yolk sac, while fry are able to feed themselves. Fingerlings have functional fins and scales that are comparable to adult fish anatomy, unlike fry.
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  • What is the difference between a manta ray and a stingray?

    Q: What is the difference between a manta ray and a stingray?

    A: Manta rays and stingrays differ in size, diet and appearance. Manta rays are significantly larger than the stingrays, with oceanic mantas reaching a size of 23 feet from wing tip to wing tip, and reef mantas, a smaller species, reaching a wing span of 9 to 15 feet. Larger stingrays grow to 6.5 feet in length. The manta ray also lacks the characteristic venomous stinger found on the stingray's tail.
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  • What is the difference between anchovies and sardines?

    Q: What is the difference between anchovies and sardines?

    A: Sardine is a generic term used to refer to small, silvery saltwater fish that are related to the herring and are found worldwide. Anchovy refers to a family of small fish found in the Mediterranean Sea, Black Sea and Atlantic and Pacific coasts.
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  • How do I care for guppies?

    Q: How do I care for guppies?

    A: Guppies add life and color to a home aquarium, but they require special care to ensure their longevity. Caring for guppies requires a tank, a lighting unit, an air pump, a filtration unit, a siphon vacuum, water and fish food.
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  • What do river fish eat?

    Q: What do river fish eat?

    A: River fish eat crustaceans such as crabs and mollusks. Large river fish such as gar eat other fish. Trout eat smaller fish but also eat insects such as dragonflies, mayflies and caddisflies. They also sometimes feed on zooplankton, which are tiny animals that are swept along by the river's current.
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  • How do fish gills work?

    Q: How do fish gills work?

    A: Fish gills act as the equivalent of a mammal's lungs by taking in oxygen and releasing carbon dioxide. Oxygen and carbon dioxide travel across small, thin-walled blood vessels in both lungs and gills. In terms of evolution, gills are significantly older than lungs.
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  • What was the biggest sturgeon ever recorded?

    Q: What was the biggest sturgeon ever recorded?

    A: "Field & Stream" says the 468-pound sturgeon caught by Joey Pallotta III is the biggest landed using a rod and reel. Some controversy surrounds the world record for biggest sturgeon, however, and other publications have reported larger catches.
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  • What do sea fish eat?

    Q: What do sea fish eat?

    A: Sea fish feed on small creatures, smaller fish and various dead organisms that drop down from higher water levels. It is common for sea fish to go as long as two weeks without eating, as food is often scarce in the deep sea.
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  • What is a wild Atlantic salmon?

    Q: What is a wild Atlantic salmon?

    A: The wild Atlantic salmon is a fish of the Salmonidae family, native to the northern Atlantic Ocean and rivers flowing into it. The juvenile salmon live in freshwater rivers and streams until they migrate out to sea, eventually returning to spawn.
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  • How long does a fish stay pregnant?

    Q: How long does a fish stay pregnant?

    A: The length of pregnancy in a fish varies greatly depending on the species of fish. The length of pregnancy, or gestation period, can vary from as little as three weeks to ten months.
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  • What type of fish is Dory from Finding Nemo?

    Q: What type of fish is Dory from Finding Nemo?

    A: Dory's character in "Finding Nemo" is a blue tang fish. Blue tang fish are characterized by their bright blue coloring and yellow tail. These fish are found in the Pacific and Indian Oceans.
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  • Where do puffer fish live?

    Q: Where do puffer fish live?

    A: According to National Geographic, puffer fish live in sub-tropical and tropical waters. In Asia, they are commonly found around Japan, China, Taiwan and the Philippines, while in the Caribbean, they are found in the West Indies and Mexico.
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  • What are big-eyed goldfish?

    Q: What are big-eyed goldfish?

    A: Types of goldfish that have oversized eyes include bubble eyes, celestials, telescopes and black moors. A fifth type of large-eyed goldfish is the demekin, which is a cross between the telescope variety and the arch-bodied ryukin variety.
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