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Tokyo bitterling male adult fish, Pseudorhodeus tanago, but widely known as Tanakia tanago. This species was listed in the 1996 IUCN Red List as \
Powder blue tang, Acanthurus leucosternon, is a surgeonfish found in the tropical waters of the Indian Ocean
The Marbled Duck or Marbled Teal (Marmaronetta angustirostris).
Underwater Blotched picarel fish deep in sea Sea life Mediterranean sea  Scuba diver point of view of modraka,   tragalja Spicara maena
Yellow citron cichlid in aquarium against background sea sand
Painted comber (Serranus scriba) in the French Mediterranean Sea
A close up view of a nudibranch which is sitting on a coral. There are tiny red creatures on its back resembling red fleas
Blackeye Goby,  Rhinogobiops nicholsii, Pacific Coast of California. Gobiidae.
Female Long-tailed Duck swimming in tranquil waters
The Ring-Necked Duck (Aythya collaris) is a North American diving duck found in freshwater ponds and lakes.  The duck’s name comes from the drake’s cinnamon colored neck ring.  The male also has two white rings around its gray bill, a shiny black head, black back, a white line on the wings, a white breast and yellow eyes. The female has a grayish brown head and body with a dark brown back and a dark bill.  The breeding habitat of the ring-necked duck is lakes and ponds in the northern United States and Canada. Ring-necked ducks pair up during spring migration and then separate after breeding.  These ducks are omnivores and feed mainly by diving or dabbling for submerged plants such as pondweed, wild rice, coontail and snails.  These two male ring-necked ducks were photographed while swimming in the Bubbling Ponds Fish Hatchery near Cornville, Arizona, USA.
a school of Salmon swim up Dave's Creek to spawn on the Kenai Peninsula, Alaska
Female and male northern pintail (Anas acuta) swimming in a lake.
Pike fish underwater closeup scene
Male and female gadwall ducks, Mareca strepera, in warm morning light.
Trout in an aquarium for sale
Swimming Shark
A red, white and blue betta fish or siamese fighting fish in front of a green java fern in an aquarium
My home fish tank
exotic aquarium fish close up
Swans and ducks in the lake at Sunrise at Middle Creek Wildlife Management Area, Pennsylvania, USA
Underwater School of Silver Gray Fish in Aquarium
Image of a Nassau grouper (Epinephelus striatus)and coral reef in Cayman Brac - Cayman Islands
Atlantic puffin on Machias Seal Island, off the coast of Maine.
Great crested grebes pairing up for the breeding season
Fish
Russet Angelfish or Potter's Angelfish Centropyge potteri occurs in Hawai'i and Johnston Island only. This is the most common Angelfish species in Hawai'i. \n\nMales maintain a harem of 2-7 females, when a male is removed, the dominant female changes sex to become the new female. Max. size  13cm \n\nUSA, Hawai'i, West Coast Big Island at 11m depth \n19°19'39.642\
A tadpole, nearly finished developing into a brown grass frog, lies on a bed of plants at the bottom of the pond, Rana temporaria
Scalefin Anthias
selective focus on one chiton in stone. Surface of coastline stone. Living organism of the Red Sea
Two Canada geese floating/swimming together close up on a cold very windy day in Colorado Springs, Colorado in western United States of America (USA).
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