Vulnerable· population decreasing· assessed 2020

Whitetip Reef Shark

Triaenodon obesus

Sighting evidence at YO-257 Wreck, Oahu

Photo: thegeckoguy907 · CC BY-NC

Whitetip reef sharks cruise the sandy bottom flanking the YO-257 and occasionally rest in the wreck's darker interior cavities during daylight hours. As apex predators, they regulate populations of reef fish and cephalopods, maintaining the ecological balance of the artificial reef community that has developed over three decades.

Evidence at this site

21 records within 25 km

Confidence: medium

Last confirmed Jun 2026

Seasonality

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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.

Whitetip Reef Shark

Evidence at this site

Seasonality

Also seen at other sites