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Symphysodon discus in an aquarium on a green background
Colorful Coral Reef Teeming with Exotic Fish. Lively and colorful coral reef in a vibrant underwater world. Diverse array of tropical fish swimming freely in their aquatic environment, creating a mesmerizing scene for nature and animal enthusiasts alike.
Close-up portrait of Moray with open mouth peeks out of its hiding place. Yellow-mouthed Moray Eel (Gymnothorax nudivomer) Red Sea, Egypt
Tropical fish pets in domestic fish tank
different fishes in aquarium for design purpose, wallpaper
Fish animals, plants and seaweed on the bottom of the ocean
The reedfish, ropefish (more commonly used in the United States), or snakefish, Erpetoichthys calabaricus, is a species of fish in the family Polypteridae alongside the bichirs. It is the only member of the genus Erpetoichthys. It is native to fresh and brackish waters in West and Central Africa. The reedfish possesses a pair of lungs in addition to gills, allowing it to survive in very oxygen-poor water. It is threatened by habitat loss through palm oil plantations, other agriculture, deforestation, and urban development
Acanthurus sohal
Paracanthurus hepatus, Blue tang  in Home Coral reef aquarium. Selective focus.
The Moorish idol, Zanclus cornutus, is a small marine fish species, of the family Zanclidae. Indo-Pacific and Gulf of California.
Large muraena (moray eel, muraenidae) in a huge aquarium in Hotel Atlantis on island Hainan. Sanya, China.
Turtles and fish swim in the aquarium
Blue Dragon, Glaucus Atlanticus, Blue Sea Slug
POV - you are looking at the peaceful scene under water
Male Randall's Anthias' become striped in red and magenta while females will have a yellow nose. Randall's Anthias does best when kept in a species-specific tank of at least 70 gallons, or up a minimum of a 125 gallon aquarium when maintaining a small group. Males are best kept alone with several females, or singly.
Fish on a coral reef
Underwater jungle in tropical fresh water aquarium with live dense red and green plants, different fishes and blue background in low key
Close up of two ornate butterflyfish swimming around coral heads in Hawaii.
Pompadour small fish swimming in aquarium. Red Symphysodon discus swims in fishtank, side view
large tinfoil barbs in tropical fish tank / aquarium
Marble Angelfish (Pterophyllum scalare) - Freshwater Fish
One Giant Moray Eel (Gymnothorax javanicus) is hunting on a coral reef.  Normally nocturnal hunters it is a rare site to see this Moray Eel swimming by day.  Approximately two meters long they are ferocious predators.  Image taken whilst scuba diving at Phi Phi archipelago, Thailand.
Various river fish swim in a large aquarium in the oceanarium.
Coral reef aquarium with tropical fish.
Corals and fish in saltwater aquarium. Observation of the underwater world. Animal and plants photo underwater
Mandarin fishes inhabit shallow protected lagoons and inshore reefs. They occur in the Western Pacific from Ryukyu Islands to Australia, usually in small groups spread over small area in a depth range from 1-18m, max. length 7cm. \nMandarinfish do not have scales, but a mucus layer for protection. It is not only a stinky slime they produce, but they also secrete a toxin to protect them against predators. Their dramatic colouration, known as aposematism, is a warning: unpalatability and toxicity - both prey and predator get to live longer. \nThe couples perform an extraordinary courtship dance at dusk. Females gather at the reef, judging if a male is worthy. A male who has successfully courted a lady attaches to her at the pelvic fin. Then the pair swim up from the reef towards the waters surface, releasing a cloud of sperm and around 200 eggs smaller than 1mm. \nThis specimen is a male: The presence of an elongated spine at the front of the first dorsal fin of males is distinctive. Females will not have this spike and will have a rounded first dorsal fin instead. In this case, there was a female too, but she didn't make it into the photo.\nBanda Neira Island, Indonesia, \n4°30'40.842 S 129°53'19.71 E at 1.5m depth
The amazing diversity of sea anemone.Aquarium corals reef
Tropical fish in domestic fish tank
Amazing dream aquarium tank
Zebra Moray, Gymnomuraena zebra,  from southern Baja California, Mexico,
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