Sex Change Normality (Press, 22 July 1989)
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Summary: Sex Change Normality (Press, 22 July 1989)
The article "Natives" by Andrew Jeffs, published on 22 July 1989, explores the unique characteristics and behaviour of the spotted-black grouper, a remarkable species of fish known for its ability to change sex and colour. The spotted-black grouper typically starts life as a female and transitions to a male upon reaching about one metre in length. These fish can grow to impressive sizes, with lengths up to 1.5 metres and weights exceeding 45 kilograms. Remarkably, individuals of this size may be over 100 years old. The spotted-black grouper has a distinctive appearance, generally exhibiting a dark green-black colour adorned with white-yellow spots. This colour can change rapidly to green-brown with prominent pale stripes when the fish feels threatened or frightened. Despite their size and potential danger, these fish are described as timid, often displaying trusting behaviour towards human divers who may encounter them. Spotted-black groupers typically inhabit shallow waters on rocky reefs, spending their days hidden in large rocky crevices or caves. They may share these hiding places with other reef fish or even crayfish. As predators, they primarily hunt small fish and crabs, showcasing their lurking hunting strategy. Geographically, the spotted-black grouper is found throughout the Pacific region, but in New Zealand, they are primarily located along the warmer waters of the northern coast. Unfortunately, very little is known about these fish due to the significant reduction in their populations in many parts of the world, largely attributed to limited fishing practices. Thankfully, a remaining population is thought to survive at the Kermadec Islands, located approximately 1000 kilometres north-east of Auckland. The remoteness of these islands has helped protect them from fishing, allowing this unique species a chance at survival.
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