The black-gill surgeonfish has a sharp spine on each side of its tail handle. Juveniles are purple-yellow and adults are dark brown. There are orange spots on the front and back of the orbit. There are dense orange dark ripples on the side of the body. There is a black band from the upper end of the gill opening through the posterior edge of the gill cover to the cheek. Body length 20 cm. Distribution area: tropical waters of the Indian Ocean and tropical waters of the central and western Pacific Ocean.
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Shoulder-ringed crappie has multiple annular bands on its side and small blue rings on its shoulders. The dorsal fin has 12 sharp spines. There are serrations on the edge of the opercular bone, and there is a strong spine at the corner. The abdominal knot and anal fin both have strong spines....
The Dardanelles Strait is located on the west side of the northwest corner of Turkey. It is an important channel connecting the Sea of Marmara and the Aegean Sea. The total length of the strait is 71 kilometers, the narrowest point is only 1.3 kilometers, the widest is 7.5 kilometers, and the...
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The feathered butterflyfish has 14 dorsal fin spines, and the trailing edge of the fin ray is sharp and convex. The head has a horizontal band across the eye diameter. There are multiple feathery diagonal bands on the side of the body. The anal fin has 4 strong spines. The tail fin is broad a...
There are 25-27 scales in a row of mud fish. The preorbital and infraorbital bones are scaly and have serrated lower edges. There are 3 horizontal bands on the sides of the body. A small warm-water fish that inhabits coral reef areas. Body length is generally 10-52 mm....
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The Arctic Ocean is roughly centered on the Arctic Circle and is located at the northernmost point of the earth. It is surrounded by the European continent and the North American continent. It is connected to the Pacific Ocean through the narrow Bering Strait. It is connected to the Atlantic...
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