scubaseason

Nurse shark

Ginglymostoma cirratum

Sighting evidence at Kelleston Drain, Tobago

Nurse shark

Photo: Rafael de la Parra · CC BY-NC

Nurse sharks are obligate bottom-dwellers that rest in clusters during the day in Kelleston Drain's deeper sandy channels, relying on buccal pumping to pass water over their gills while stationary. They are primarily nocturnal hunters of octopus, squid, and reef fish. Despite their docile reputation, nurse sharks are an important indicator species — their continued presence at Kelleston Drain signals that the site retains healthy reef structure and has not experienced significant fishing pressure.

Evidence at this site

No confirmed records on file at this site

Nurse shark is listed as a curated species here based on historical reports.

How is this calculated?

Sighting evidence is compiled from iNaturalist observation records within a set proximity radius, filtered for quality-grade observations. “Last confirmed” is the date of the most recent research-grade record. Record count covers a rolling 24-month window. Confidence reflects record count, recency, and consistency of seasonal signal.

Also seen at other sites