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The world's smallest fish depends on the measurement used. [1]Based on minimum standard length at maturity the main contenders are Paedocypris progenetica where females can reach it at 7.9 mm (0.31 in), [2] [3] [4] the stout infantfish (Schindleria brevipinguis) where females reach it at 7 mm (0.28 in) and males at 6.5 mm (0.26 in), [1] and Photocorynus spiniceps where males can reach it at 6. ...
Trimmatom nanus, the midget dwarfgoby, is a species of marine goby native to the Indian Ocean and the western Pacific Ocean.It can mainly be found on oceanic drop-offs at depths of from 20 to 30 metres (66 to 98 ft) though it can occasionally be found in outer reef areas and lagoons at depths of from 5 to 35 metres (16 to 115 ft).
One of the smallest vertebrates and the smallest fish based on the minimum size at maturity is Paedocypris progenetica from Indonesia, with mature females measuring as little as 7.9 mm (0.31 in) in standard length. [35] This fish, a member of the carp family, has a translucent body and a head unprotected by a skeleton.
The adults live on the sea floor, between 100 and 2,800 m (330 and 9,190 ft) deep, [7] [8] The intense biological pressure to conserve energy within deep sea fish seems to be true across many species; most of them are long lived, have a slow rate of reproduction, growth, and aging. Furthermore, studies have shown that the Psychrolutidae species ...
They are most commonly found in the mesopelagic zone of the ocean, mostly at depths of over 300 meters (1,000 feet), and many species have bioluminescence. [ 1 ] Cyclothone is believed to be the most abundant fish genus on Earth, with estimates that there are up to a quadrillion individuals (10 15 , or one million billion in the short scale ).
He has written a description of the fish along with another species of the same genus called Paedocypris micromegethes. It is one of the smallest known fish in the world, together with species such as Schindleria brevipinguis , with females reaching a maximum standard length of 10.3 mm (0.41 in), males 9.8 mm (0.39 in) and the smallest known ...
Chimaeras live in temperate ocean floors, with some species inhabiting depths exceeding 2,000 m (6,600 ft), [8] with relatively few modern species regularly inhabiting shallow water. Exceptions include the members of the genus Callorhinchus , the rabbit fish and the spotted ratfish , which locally or periodically can be found at shallower depths.
Known as weedy cardinalfish, this is a marine fish species of Indo-Pacific distribution, the type locality being the Philippines. Both the genus and species name derive from the word fo, Samoan for "cardinalfish". [10] Ja ana S. Ueno, 1955 – Family Carabidae. This is a blind carabid from the Ja-Ana Cave near Gifu in southern Japan.