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  2. Reef aquarium - Wikipedia

    en.wikipedia.org/wiki/Reef_aquarium

    A reef aquarium or reef tank is a marine aquarium that prominently displays live corals and other marine invertebrates as well as fish that play a role in maintaining the tropical coral reef environment. A reef aquarium requires appropriately intense lighting, turbulent water movement, and more stable water chemistry than fish-only marine ...

  3. Fish locomotion - Wikipedia

    en.wikipedia.org/wiki/Fish_locomotion

    Fish locomotion. Fish locomotion is the various types of animal locomotion used by fish, principally by swimming. This is achieved in different groups of fish by a variety of mechanisms of propulsion, most often by wave-like lateral flexions of the fish's body and tail in the water, and in various specialised fish by motions of the fins.

  4. Sensory systems in fish - Wikipedia

    en.wikipedia.org/wiki/Sensory_systems_in_fish

    The abilities of the electric fish to communicate and identify sex, age, and hierarchy within the species are also made possible through electric fields. EF gradients as low as 5nV/cm can be found in some saltwater weakly electric fish. [27] Several basal bony fishes, including the paddlefish (Polyodon spathula), possess electroreceptors.

  5. Saltwater fish - Wikipedia

    en.wikipedia.org/wiki/Saltwater_fish

    Saltwater fish. Saltwater fish, also called marine fish or sea fish, are fish that live in seawater. Saltwater fish can swim and live alone or in a large group called a school. [1] Saltwater fish are very commonly kept in aquariums for entertainment. Many saltwater fish are also caught to be eaten, [2][3] or grown in aquaculture.

  6. Counter-illumination - Wikipedia

    en.wikipedia.org/wiki/Counter-illumination

    Counter-illumination is a method of active camouflage seen in marine animals such as firefly squid and midshipman fish, and in military prototypes, producing light to match their backgrounds in both brightness and wavelength. Marine animals of the mesopelagic (mid-water) zone tend to appear dark against the bright water surface when seen from ...

  7. Aquarium lighting - Wikipedia

    en.wikipedia.org/wiki/Aquarium_lighting

    The lighting used for reef aquariums is the highest intensity of all aquarium types. Typical light sources types include LED, fluorescent, metal halide, and sometimes plasma lamps. Simple lighting setups use a single lamp or multiple lamps of a single type. More advanced setups can include several lamp types and can also include lamps of ...

  8. List of marine aquarium fish species - Wikipedia

    en.wikipedia.org/wiki/List_of_marine_aquarium...

    The four stripe damsel is a perfect beginner marine fish as it is very hardy. This fish is highly territorial and is best suited for a semi-aggressive to aggressive tank. 10 cm (3.9 in) Garibaldi damsel: Hypsypops rubicunda: Yes: These are temperate fish and require cooler water. They are much larger than most other damsels. 30 cm (11.8 in)

  9. Barracuda - Wikipedia

    en.wikipedia.org/wiki/Barracuda

    Barracuda are snake -like in appearance, with prominent, sharp-edged, fang -like teeth, much like piranha, all of different sizes, set in sockets of their large jaws. They have large, pointed heads with an underbite in many species. Their gill covers have no spines and are covered with small scales. Their two dorsal fins are widely separated ...

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