A number of wrasse species are common to Tasmanian waters, with the most frequently encountered species being the blue throated wrasse. Blue throat wrasse are a peculiar animal as they change sex from female to male, and in doing so, their colour and general appearance changes. Juveniles have a nondescript appearance, but when they mature into females they gain a thick black and white stripe across their body. Large females turn into males when required, and develop a distinctive blue throat and yellow fins. They will aggressively compete with other fish species for breeding territories. They can live to 11 years old, and grow to 50 cm in length and around 4 kg.