Euprymna hyllebergi, the Thai bobtail squid is a species of squid belonging to the family Sepiolidae and is native to the eastern Indian Ocean. It is commonly found in the Andaman Sea of Thailand and in the Gulf of Thailand. E. hyllebergi can grow up to 35mm in mantle length and can be found in depths as low as 74m. The Thai bobtail squid is covered in chromatophores, which are pigmented cells that can expand or contract and are used to camouflage the squid. The normal lifespan of the Thai bobtail squid is between 92 and 122 days for males and between 80 and 113 days for females.

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