Fish

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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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  • How long do fish live?

    Q: How long do fish live?

    A: Fish lifespans can average anywhere from one year to 20 years. The lifespans of aquarium fish vary greatly depending on the species.
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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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  • What are some compatible fish for guppies?

    Q: What are some compatible fish for guppies?

    A: While guppies do not bother other fish, selecting appropriate species to share their tank involves choosing types that don't bother them, such as small cichlids. Although larger cichlids are sometimes aggressive, rams and kribs are available in several colors and generally do not bother other fish in the tank.
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  • What fish eat shrimp?

    Q: What fish eat shrimp?

    A: Most freshwater, tropical and marine aquarium fish eat shrimp, and many commercial foods contain dried shrimp and shrimp by-products. Many stores, including Petco and PetsMart, offer high-quality prepared fish foods such as freeze-dried shrimp treats and shrimp pellets that are designed to feed many species with just one food. Farmed fish eat commercial diets that include shrimp by-products, and carnivorous fish eat live shrimp, according to American Aquarium Products.
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  • What do small fish eat?

    Q: What do small fish eat?

    A: Small freshwater fish typically eat vegetation, insects, larvae, leeches, shrimp and dead or decaying matter, and small saltwater fish, called forage or feed fish, eat plankton. The tiny American herring eats small and larval shrimp as do both Atlantic and Pacific cod.
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  • What is a tomato clownfish?

    Q: What is a tomato clownfish?

    A: The Tomato Clownfish is a member of a group of five anemonefish known as the Tomato complex. The Tomato Clownfish is one of the largest members of the complex with females growing to be over five inches in length. On average, females are roughly half an inch longer than males.
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  • Where do clownfish live?

    Q: Where do clownfish live?

    A: Clownfish, also called anemonefish, live in the warm waters of the Pacific and Indian Oceans, the Red Sea and the Great Barrier Reef. These fish have a symbiotic relationship with anemones, which are slow-moving invertebrate animals that look like flowering plants. Clownfish never venture far from their anemone partners.
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  • How big do koi carp grow?

    Q: How big do koi carp grow?

    A: Koi carp grow to an average size of 24 to 36 inches long. It is possible for some to reach lengths greater than 4 feet but only when pond conditions replicate their natural environment and they have plenty of space.
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  • What do red snapper eat?

    Q: What do red snapper eat?

    A: Red snapper are mostly carnivores, although they do consume a few tiny plants. They mainly eat other fish, crustaceans and shrimp.
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  • Do betta fish like light?

    Q: Do betta fish like light?

    A: Betta fish, also known as Japanese fighting fish, prefer regular periods of light and darkness. This ensures that the fish have a normal sleeping pattern.
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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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  • What is the most poisonous fish in the world?

    Q: What is the most poisonous fish in the world?

    A: Reef stonefish are the most poisonous fish in the world. Stonefish live in warm, tropical waters, primarily in the Oceanic region of Australia and New Zealand. They have 13 long spines in their dorsal fins that are filled with highly toxic venom, which the stonefish use to kill prey.
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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 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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  • 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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  • Do fish have brains?

    Q: Do fish have brains?

    A: Fish have brains. According to LiveScience, in 2013, scientists were able to successfully produce images of the activity of a fish's brain as it watched its prey.
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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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  • Are both jaws of a fish equally movable?

    Q: Are both jaws of a fish equally movable?

    A: In most fish, the lower jaw is far more flexible than the upper jaw. Many fish have fixed upper jaws formed from the bony plates that also form parts of their faces.
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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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  • Why do salmon swim upstream?

    Q: Why do salmon swim upstream?

    A: Salmon return to rivers from the ocean and swim upstream to their original hatching place to lay and fertilize their eggs. Swimming upstream is hard work, and only the strongest complete the journey and spawn the next generation of salmon.
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  • Do fish have hearts?

    Q: Do fish have hearts?

    A: A fish has a heart, which acts as the center of its circulatory system, pumping blood throughout the body and transporting vital nutrients and oxygen to cells. The size, placement and strength of a fish's heart differs between species.
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