Borneo Shark

The Borneo shark is a requiem shark swimming in the waters of northwestern Borneo.

Borneo Shark Scientific Classification

Kingdom Animalia
Phylum Chordata
Class Chondrichthyes
Order Carcharhiniformes
Family Carcharhinidae
Genus Carcharhinus
Scientific Name C. borneensis

Description

They are slim sharks with circular eyes, pointed snouts, and slit-like nostrils. The largest known specimen was 26 inches long. Inside their mouth are 25-26 rows of serrated upper teeth and 23-25 rows of slender, finely serrated lower teeth.

Borneo sharks have a large first dorsal fin, a smaller second dorsal fin, two sickle-shaped pectoral fins, two small triangular pelvic fins, and a caudal fin with a large upper lobe.

When looked at from above, these sharks are slate grey; when seen from below, they are white.

Where do they live

As their name suggests, this shark lives on and around the coasts of Borneo, though nowadays, it is only seen around the coastal town of Mukah. There have been sightings in China as well.

They live in shallow coastal habitats.

Behavior

Feeding

Their diet consists of bony fish.

Reproductive

Borneo sharks are viviparous, giving birth to 6 pups. Initially, the newborns are 9.4–11.0 inches long. Sexual maturity is observed in males when they are 22–23 inches long and in females when they are 24–26 inches long.

Adaptations

The eyes of this shark have nictitating membranes that protect them from sand and silt particles.

Interactions with humans

Borneo sharks face a high risk of going extinct as attempts to locate them within their given range fail regularly. This has caused the IUCN to classify it as “Critically Endangered” or “CR”.

Sources

Recommended Blog Posts

Famous Sharks