Blacktip reef sharks return to Sanya city's Wuzhizhou Island

Several blacktip reef sharks swim in the shallow waters around Wuzhizhou Island. [Photo/Sanya Daily]

A blacktip reef shark swims leisurely in the shallow waters of the island. [Photo/Sanya Daily]

Recently, the waters around Wuzhizhou Island off Sanya city have once again welcomed "old friends" in the form of blacktip reef sharks, also known as Carcharhinus melanopterus.

The sharks were seen swimming leisurely in shallow waters near the island, allowing visitors to safely enjoy watching them from shore.

Blacktip reef sharks are typically small to medium-sized sharks found in tropical coral reefs. They're listed as a vulnerable species by the International Union for Conservation of Nature, underscoring their ecological importance.

Adults usually measure 1.2-1.4 meters long, with some reaching up to 2m. Their distinctive black-tipped fins make them easy to identify.

The sharks are quite particular about their habitat, thriving in water temperatures of 24°C-27°C, with clean waters and healthy coral reefs that provide plenty of fish, shrimp and crustaceans. Any disruption to water quality or the food chain can challenge their survival.

Thanks to ongoing conservation work, Wuzhizhou Island has become an ideal spot for them.

The area boasts gentle shallow reefs, crystal-clear waters, stable currents, well-preserved coral reefs and abundant food — fulfilling their special needs for their habitat and feeding.

Marine monitoring records show that blacktip reef sharks often swim in groups in shallow waters where reefs and sand meet.

They're known for their gentle nature and pose no threat to humans, making it safe to observe them at a distance.

Their frequent presence is a clear indication of the success in local marine ecological restoration — painting a picture of harmonious coexistence between humans and marine life.

In addition to blacktip reef sharks, the waters there are home to other rare marine species like wild dolphins and hawksbill turtles (Eretmochelys imbricata).

In May this year, underwater photographers also captured images of the rarely seen leaf sheep sea slug — a tiny mollusk highly sensitive to water quality — serving as a natural indicator of environmental health.

A representative from the Wuzhizhou Island tourism zone said that future plans included ongoing coral reef restoration, enhancing regular marine life monitoring and further raising awareness on marine ecology through more publicity and education efforts.

The goal is to inspire visitors to care for the ocean and protect marine life — ensuring a clean and stable habitat for various rare marine species through careful management.