Mailed butterflyfish [Chaetodon reticulatus]

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The mailed butterflyfish (Chaetodon reticulatus) is a species of butterflyfish found at depths of from 1 to 30 metres (3.3 to 98 ft) on reefs in the central and western Pacific Ocean. It grows to a length of 18 centimetres (7.1 in) TL and can be found in the aquarium trade. It is also of minor importance to local commercial fisheries.

 Pictures: Cook Islands by Sami Salmenkivi

Four-spotted Butterflyfish [Chaetodon quadrimaculatus]

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The Four-spotted Butterflyfish or fourspot butterflyfish, Chaetodon quadrimaculatus is a species of butterflyfish (family Chaetodontidae) found in the Pacific Ocean from the Ryukyus, Ogasawara (Bonin) Islands and Taiwan to the Hawaiian, Marquesan, and Pitcairn islands, south to the Samoan and Austral Islands and the Marianas and Marshall Islands in Micronesia. It is a quite distinct species, but most closely related to the Speckled Butterflyfish (C. citrinellus). Together they are basal in the subgenus Exornator, and might be intermediate between the core group of this subgenus and the species of the Rhombochaetodon (or Roaops) lineage. If that is correct, the latter would require to be merged into Exornator. If the genus Chaetodon is split up, Exornator might become a subgenus of Lepidochaetodon.

 Pictures: Cook Islands by Sami Salmenkivi

Threeband pennantfish [Heniochus chrysostomus]

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Heniochus chrysostomus, common name Threeband pennantfish, is a tropical fish of the family Chaetodontidae. Heniochus chrysostomus can attain a maximum length of 18 centimetres (7.1 in) in males. The body is oval, laterally flattened, with a basic white color and three broad oblique brown bands. The first band runs from the forehead up to the pelvic fins, the second from the dorsal fin to the anal fin, the third is adjacent to the dorsal fin. The dorsal fin is elongated, in juveniles much more than in adults. Juvenile fishes are solitary. The snout tip is yellow. This species is oviparous and feeds on coral polyps. This species has an Indo-Pacific distribution, from Western India to Pitcairn Islands, Japan, southern Queensland, Micronesia and New Caledonia. Threeband pennantfish typically lives below the intertidal zone in coastal waters and in shallow water lagoon among the coral reefs, at a depth of 2–40 metres (6 ft 7 in–131 ft 3 in).

 Pictures: Papua, Indonesia by Sami Salmenkivi

Picasso Triggerfish [Rhinecanthus aculeatus]

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The lagoon triggerfish (Rhinecanthus aculeatus), also known as the blackbar triggerfish, the Picasso triggerfish, thePicassofish, and the Jamal, is a triggerfish, up to 30 cm in length, found on reefs in the Indo-Pacific region. The Hawaiian name for the fish, humuhumunukunukuāpuaʻa, (meaning “triggerfish with a snout like a pig”) shares the same name with the reef triggerfish, the state fish of Hawaii. This species has been studied in a range of research contexts, from locomotion to colour vision research.

 Pictures: taken at Cook Islands by Sami Salmenkivi

Teardrop Butterflyfish [Chaetodon unimaculatus]

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The Teardrop ButterflyfishChaetodon unimaculatus, is a species of butterflyfish (family Chaetodontidae). In the Indian Ocean it is replaced by the Yellow Teardrop Butterflyfish (C. interruptus), now considered to be a separate species but previously included in C. unimaculatus as a subspecies. In its subgenus Lepidochaetodon – sometimes considered a separate genus– it is only distantly related to species such as the Sunburst Butterflyfish (C. kleinii) and the Tahiti Butterflyfish (C. trichrous).

 Pictures: at Cook Islands by Sami Salmenkivi

Ribboned sweetlips [Plectorhinchus polytaenia]

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The Ribboned sweetlipsPlectorhinchus polytaenia, a sweetlips of the family Haemulidae, also known as the yellow-ribbon sweetlips, is found in East Indo-West Pacific oceans. Its length is up to 50 cm.

Juveniles have black stripes and live alone on rubble slopes in deep water. As they age, the black is reduced to an outline, and the stripes become more yellow; increasing stripes develop with age. Their bright colors help them blend into the coral they live in. These fish feed on crabs, shrimps, sea snails and worms. Ribboned Sweetlips get their name from their large lips.

 Pictures: Komodo, Indonesia by Sami Salmenkivi

Pyramid Butterflyfish [Hemitaurichthys polylepis]

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The Pyramid Butterflyfish (Hemitaurichthys polylepis) is a species of butterflyfish in the genus Hemitaurichthys.
The butterflyfish can grow up to 18cm in length. The Pyramid Butterflyfish is usually seen in depths between 3 m and 60 m in outer reef areas close to drop-offs. It often forms large shoals containing hundreds of individuals all swimming high in the water column feeding on plankton.

This species occurs in tropical marine waters of the Eastern Indian Ocean and Western and Central Pacific, from South-east Asia, Christmas Island and Coco-Keeling Atoll, north to Japan, south to Australia and east to the Hawaiian and Pitcairn Islands. In Australia it is known from the north-western coast of Western Australia, the Great Barrier Reef, Queensland and northern New South Wales.

This butterflyfish family contains a colorful collection of fishes with diverse body patterns. This butterflyfish bears a white pyramid-shaped patch on each side. As it grows its head changes color form yellow to brown. (text source: Wikipedia)

 

Pictures: Misool Islands, Raja Ampat, Papua, Indonesia by Sami Salmenkivi