Selkäreppu

Selkäreppu, also known as the "sailfish," is a large, predatory fish belonging to the family Istiophoridae. It is found in tropical and subtropical waters worldwide, particularly in the Atlantic, Pacific, and Indian Oceans. The selkäreppu is characterized by its elongated, streamlined body, which can reach lengths of up to 2.5 meters (8.2 feet) and weigh over 100 kilograms (220 pounds). Its most distinctive feature is the large, triangular sail on its back, which is used for balance and stability while swimming at high speeds.

Selkäreppu are known for their speed and agility, often reaching speeds of up to 80 kilometers per hour (50 miles per hour). They are apex predators, feeding on a variety of fish and squid. Their diet includes smaller tuna, mackerel, and other fast-swimming fish, which they catch using their powerful jaws and sharp teeth.

The selkäreppu is an important species in many ecosystems, serving as a food source for larger predators such as sharks and dolphins. However, overfishing and habitat destruction have led to declines in some populations. Conservation efforts are underway to protect this species and ensure its survival in the wild.