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Inquisitive barracuda inspects the camera. coral reef in the background

Aulonocara cichlid red-shouldered peacock. Aulonocara Hansbaenschi.

Tropical fish swimming through the open water over coral reef

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.

High fin whiptail catfish Rineloricaria lanceolata freshwater aquarium fish

The Arctic grayling (Thymallus arcticus) is a species of freshwater fish in the salmon family Salmonidae. T. arcticus is widespread throughout the Arctic and Pacific drainages in Canada, Alaska, and Siberia, as well as the upper Missouri River drainage in Montana. Wyoming.

$Banded Sea Snake Laticauda colubrina on a outer reef swimming to surface, looking for fresh water. Sea Snakes need to drink fresh water and regularly come onto land for that purpose. The Banded Sea Snake Laticauda colubrina occurs in tropical Indo-Pacific. Males maximum length 88 cm, females 142 cm. The Banded Sea Snake is often seen in large numbers in the company of hunting parties of giant trevally (Caranx ignobilis) and goatfish. Their cooperative hunting technique is similar to that of the moray eel, with the Snakes flushing out prey from narrow crevices and holes. \nThis specimen was encountered in the Triton Bay, Kaimana Regency, West Papua Province, Indonesia, 3°55'0.7321 S 134°6'7.7298 E.$

Guppy fish isolated in white background. Poecilia reticulata

Large Kingfish or Amberjack swimming in clear blue water

Female and Male (on background) of Great Crested Newt (Triturus cristatus). Male's skin color and crest is typical for breeding time.

Underwater photography of tropical reef fish species in Papua New Guinea

Acadian redfish underwater in the St-Lawrence River

Holacanthus clarionensis, also known as the clarion angelfish, is a species of marine angelfish of the family Pomacanthidae. Baja California. Mexico.

Odessa barb Pethia padamya freshwater aquarium fish

Redbreasted Wrasse Cheilinus fasciatus occurs in the tropical Indo-Pacific from the east coast of Africa and islands of the western Indian Ocean to Micronesia and Samoa and Tonga, north to the Ryukyu Islands, Japan and south to Queensland, Australia in a depth range from 4-60m, but usually not deeper than 40m, max. length 40cm. This specimen was encountered at the Iro Wreck, a 143 meter oil tanker wreck since March 1944, WWII, was ordered by the Japanese Navy during the 1920´s building programs. Although heavily overgrown with black coral and sponges, the torpedo hole is still clearly visible. The wreck sits upright between 15m and 36m of water. The outside of the ship has developed a nice coating of colourful invertebrates, mostly sponges and oysters. Palau 7°17'40.08 N 134°25'15.51 E at 20m depth

Large tropical fish swimming through the open ocean

Tail-spot Wrasse (Halichoeres melanurus) - Marine fish

The marsh frog (Pelophylax ridibundus), frog in water, Ukraine

Closeup of an impressive aquatic male Balkan crested newt, Triturus ivanbureschi, posing with it's huge crest

$Mandarin fishes inhabit shallow protected lagoons and inshore reefs. They occur in the Western Pacific from Ryukyu Islands to Australia, usually in small groups spread over small area in a depth range from 1-18m, max. length 7cm. \nMandarinfish do not have scales, but a mucus layer for protection. It is not only a stinky slime they produce, but they also secrete a toxin to protect them against predators. Their dramatic colouration, known as aposematism, is a warning: unpalatability and toxicity - both prey and predator get to live longer. \nThe couples perform an extraordinary courtship dance at dusk. Females gather at the reef, judging if a male is worthy. A male who has successfully courted a lady attaches to her at the pelvic fin. Then the pair swim up from the reef towards the waters surface, releasing a cloud of sperm and around 200 eggs smaller than 1mm. \nThis specimen is a male: The presence of an elongated spine at the front of the first dorsal fin of males is distinctive. Females will not have this spike and will have a rounded first dorsal fin instead. In this case, there was a female too, but she didn't make it into the photo.\nBanda Neira Island, Indonesia, \n4°30'40.842 S 129°53'19.71 E at 1.5m depth$

Silvery Bigeye Emperor floats against reef wall with Chromis and Parrotfish in background, Egypt.

Brown tang (Zebrasoma scopas) marine tropical fish

Waigeo island, Raja Ampat, West Papoua, Indonesia

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