Idiosepius pygmaeus | |
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Hatchlings of Idiosepius pygmaeus (ca. 2 mm long) stained with phosphotungstic acid (left) and Lugol's iodine (right) | |
Tropical Pigmy squid | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Cephalopoda |
Order: | Idiosepida |
Family: | Idiosepiidae |
Genus: | Idiosepius |
Species: | I. pygmaeus
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Binomial name | |
Idiosepius pygmaeus Steenstrup, 1881
[2]
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Idiosepius pygmaeus, also known as the two-toned pygmy squid, Tropical Pygmy squid, is a species of bobtail squid native to the Indo-Pacific. It occurs in waters of the South China Sea, Japan, Philippines, Palau, Indonesia, Northern Mariana Islands, as well as northern and northeastern Australia. It inhabits shallow, inshore waters.[3][4]
I. pygmaeus weighs 0.00033 g upon hatching and increases in weight to 0.175 g as it reaches maturity in 50 days (1260 degree days). It inhabits waters at a temperature of 25.2 °C. Growth rate has been calculated as 12.55 and physiological growth rate as 0.498.[5]
I. pygmaeus grows to 20 mm in mantle length.[3]
This species has been reared on a diet of glass shrimp (Acetes sibogae australis) in the laboratory.[6]
The type specimen was collected in the South China Sea (04°20′N 107°20′E / 4.333°N 107.333°E) and is deposited at the Zoologisk Museum of Kobenhavns Universitet in Copenhagen.[7]