Larvae hatch around 17 to 20 mm then grow at a rate of 0.08 to 0.35 mm daily. C. gunnari, for example, grows about 10 mm per month (Alekseeva and Alekseev 1997). They continue relatively rapid growth of 6-10 cm a year until they reach sexual maturity around 3 years of age. After that they continue growing at a rate of around 5 - 7 cm a year (Kock 2005a).