Sharks in Guam

Guam is home to several species of sharks – or as they are referred to in the local CHamoru dialect – halu’u. Common species include the blacktip shark, the whitetip reef shark, and the tawny nurse shark.

List of the Different Types of Sharks in Guam

Species Maximum Size Aggressiveness
Blacktip Shark 5-8 feet Moderately aggressive
Blacktip Reef Shark 3-4 feet Moderately aggressive (if provoked)
Blue Shark 6-11 feet Not aggressive
Bluntnose Sixgill Shark 15-18 feet Not aggressive (unless provoked)
Bull Shark 7-12 feet Highly aggressive
Galapagos Shark 9.8-12 feet Highly aggressive
Gray Reef Shark 4-5 feet Highly aggressive
Leopard Shark 6-7 feet Not aggressive
Oceanic Whitetip Shark 5-8 feet Highly aggressive
Pelagic Thresher Shark 13-18 feet Not aggressive
Scalloped Hammerhead Shark 9-12 feet Moderately aggressive
Shortfin Mako Shark 6.5-9.5 feet Highly aggressive
Shortspine Spurdog 1.5-3.5 feet Moderately aggressive
Silky Shark 7-10 feet Highly aggressive
Silvertip Shark 6.6-9.8 feet Moderately aggressive
Smooth Lantern Shark 1-1.5 feet Not aggressive
Tawny Nurse Shark 9.6-10 feet Not aggressive
Tiger Shark 10-14 feet Highly aggressive
Whale Shark 18-32 feet Not aggressive
Whitetip Reef Shark 3-5.5 feet Moderately aggressive (only when provoked)



While there have been several non-fatal incidents involving sharks in Guam, the most recent attack was fatal. On 13th April 2013, 40-year-old Korean tourist Nae Deok Kim died from drowning, but an autopsy revealed that a shark had attacked him before it happened.


While great whites have not been reported in Guam yet, their migratory patterns also encompass the island nation, and the shark could appear in Guamanian waters.


Sharks are not commonly seen in Shark Cove or its surrounding beaches.

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