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The size of guppies vary, but males are typically 1.5–4 cm (0.6–1.6 in) long, while females are 3–7 cm (1.2–2.8 in) long. A variety of fancy guppy strains are produced by breeders through selective breeding , characterized by different colours, patterns, shapes, and sizes of fins, such as snakeskin and grass varieties.
Koi in an artificial pond at a hotel in Hilo. The words "koi" and "nishikigoi" come from the Japanese words 鯉 (carp), and 錦鯉 (brocaded carp), respectively. In Japanese, "koi" is a homophone for 恋, another word that means "affection" or "love", so koi are symbols of love and friendship in Japan.
The fish then return to the rivers in the autumn, where they remain close to the mouths and in the lower reaches throughout the winter. [6] The ide reaches sexual maturity at 3–5 years of age, and once it has attained total length, which varies from 22 cm to 43 cm, although in cooler waters, it may first breed as late as 7 years of age. [6]
Fly fishing for perch using patterns that imitate small fry or invertebrates can be successful. The record weight for this fish in Britain is 2.81 kg (6 lb 3 oz), the Netherlands 3.05 kg (6 lb 11 + 1 ⁄ 2 oz), [19] and in America 2.83 kg (6 lb 4 oz). The biggest recorded catch in Sweden is 3.15 kg (6lb 15oz) in 1985.
The large pectoral fins are normally carried horizontally, perhaps helping the fish attain the profile of a shark. The first dorsal fin has six to nine independent, short, stout, sharp spines. The family name Rachycentridae, from the Greek words rhachis ("spine") and kentron ("sting"), was inspired by these dorsal spines. The mature cobia has a ...
Females may spawn two to three times per year, and produce between 80,000 and 1,000,000 eggs per event. In waters at 28 °C/83 °F, mahi-mahi larvae are found year-round, with greater numbers detected in spring and fall. [8] Mahi-mahi fish are mostly found in the surface water.
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The Japanese rice fish (Oryzias latipes), also known as the medaka, [2] is a member of genus Oryzias , the only genus in the subfamily Oryziinae. This small (up to about 3.6 cm or 1.4 in) native of Japan is a denizen of rice paddies , marshes, ponds, slow-moving streams and tide pools .