Fish

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 is included in a list of fish without scales?

    Q: What is included in a list of fish without scales?

    A: Fish that do not have scales include catfish, sharks, rays, chimaeras, skates, moray eels, sturgeons, paddlefishes, salifin blennies, combtooth blennies, hagfishes and lampreys. Many of these fish have evolved scale alternatives.
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  • What are some safe betta tank mates?

    Q: What are some safe betta tank mates?

    A: African dwarf frogs, snails and ghost shrimp, due to their unique characteristics, are all compatible tank mates for the betta. Other fish may be compatible depending upon the temperament of the individual betta. In general, avoid colorful fish, fish that are fin nippers, fish that live in brackish water, and fish that grow too large and overwhelm the tank space.
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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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  • 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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  • 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 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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  • What are some clownfish enemies?

    Q: What are some clownfish enemies?

    A: Enemies of clownfish include eels, sharks and large fish. Humans are the biggest threat to clownfish, as people catch them for use in fish tanks and aquariums.
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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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  • How do you care for a lionfish?

    Q: How do you care for a lionfish?

    A: Lionfish vary in size according to their species, and they need saltwater habitats large enough to sustain them. Though they can be fed live feeder food at first, eventually they need fresh and frozen seafood. Care must be taken to choose tank mates that lionfish do not consume. It is important to avoid touching lionfish, as their venomous stings cause serious injuries.
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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 a bioluminescent fish?

    Q: What is a bioluminescent fish?

    A: Bioluminecent fish are a collection of eye-catching creatures found in the darkest zone of the ocean that create light with chemicals produced within their bodies. These glowing fish create this light to either display a threat to predators or to lure their prey in.
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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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  • 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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  • Why do fish swim in schools?

    Q: Why do fish swim in schools?

    A: According to North Carolina Aquariums, fish swim in schools because schooling protects them from predators, encourages reproduction and makes it easier to find food. Schooling also conserves energy, as each fish drafts in the wake of the fish ahead of him. This makes it easier for fish to swim long distances without exhaustion.
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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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  • Can fish swim backwards?

    Q: Can fish swim backwards?

    A: Some species of fish, such as the moray eel, can swim backwards. Species of fish that do not swim horizontally include the catfish, the sea horse and the shrimp fish, who swim vertically.
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  • What is a female fish called?

    Q: What is a female fish called?

    A: Neither female or male fish have a specific name. Baby fish, however, are called fry or fingerlings. A group of fish is called a school, shoal, draft or run.
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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 is a mongrel koi?

    Q: What is a mongrel koi?

    A: Koi fish are really a type of carp. The term "mongrel koi" refers to koi fish which have somehow become inbred with other types of fish. Koi fish are popular for their colors and sleek appearance in fish ponds.
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  • What is an Emperor tetra?

    Q: What is an Emperor tetra?

    A: The emperor tetra is a fish of the Characidae family that's native to South America. The species is black, purple and silver in color with translucent fins that reach about 1.5 inches in length.
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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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