SIZE :
70 cm, up to 110 cm.
LIFE EXPECTANCY :
Up to 18 years.
LIFE CYCLE :
Sexual maturity when it reaches a size of around 30 cm.
Males and females mate in autumn, and fertilization takes place internally. Females lay eggs in gelatinous masses, protected in rock crevices. The parents watch over the eggs until they hatch, usually after 2 to 3 months.