Richelieu Rock
Why dive in Richelieu Rock?
BEST SEASON
Featured Animals 9
- Unlikely
- Likely
- Very likely
Frequent sightingsGiant Trevally
Caranx ignobilis
The giant trevally (Caranx ignobilis) is a large, powerful predatory fish found throughout the tropical Indo-Pacific region. Known for its steep head profile and robust body, it can reach up to 170 cm in length and 80 kg in weight. This apex predator feeds primarily on fish, but also consumes crustaceans and cephalopods, often hunting in solitary or small groups, though juveniles form schools.
Frequent sightingsGreat Barracuda
Sphyraena barracuda
The Great Barracuda is a large predatory fish known for its fearsome appearance and speed. It has an elongated body, pointed head, and large teeth, making it a proficient hunter in coastal and open waters.
Frequent sightingsGrey Reef Shark
Carcharhinus amblyrhynchos
The Grey Reef Shark (Carcharhinus amblyrhynchos) is a medium to large-sized requiem shark, common in Indo-Pacific coral reefs and adjacent waters. Characterized by its grey body and a distinctive broad black band on the trailing edge of its caudal fin, it is a fast and agile predator. These sharks are known for their social daytime aggregations, which disperse at night for individual hunting.
Harlequin Shrimp
Hymenocera picta
The Harlequin Shrimp (Hymenocera picta) is a vibrantly colored marine crustacean found in the Indo-Pacific's coral reefs. It is renowned for its striking patterns of white with pink, orange, or purple spots. This species is a highly specialized predator, feeding exclusively on starfish, which it often flips over to consume their tube feet and soft tissues. Harlequin shrimp typically live in monogamous pairs and can be found in sheltered areas such as rock crevices and caves within the reef system.
Frequent sightingsHumphead Wrasse
Cheilinus undulatus
The Humphead Wrasse is one of the largest reef fish, identifiable by a prominent hump on its forehead and thick fleshy lips. It is a protogynous hermaphrodite, meaning individuals are born female and some transition to males later in life. This carnivorous species plays a crucial role in coral reef ecosystems by preying on hard-shelled invertebrates and toxic animals like the crown-of-thorns starfish.
Frequent sightingsReef Manta Ray
Mobula alfredi
The Reef Manta Ray (Mobula alfredi) is a large filter-feeding ray found in tropical and subtropical waters, primarily around coral reefs and coastal areas. Known for its pelagic lifestyle, it feeds on zooplankton and exhibits complex social behaviors, often forming aggregations at feeding or cleaning stations. This species is listed as Vulnerable due to threats from overfishing and its slow reproductive rate.
Frequent sightingsTiger Tail Seahorse
Hippocampus comes
The Tiger Tail Seahorse is known for its striking banded tail, resembling the pattern of a tiger. It typically inhabits shallow coastal waters and coral reefs, where it uses its prehensile tail to anchor to sea grasses and corals.
Frequent sightingsWhale Shark
Rhincodon typus
The whale shark is the largest fish in the world and a gentle filter feeder.
Frequent sightingsWhitetip Reef Shark
Triaenodon obesus
The Whitetip Reef Shark is a slender, medium-sized shark easily identified by the distinctive white tips on its dorsal and upper caudal fins. Primarily nocturnal, it spends its days resting in caves and under ledges on coral reefs and hunts at night for bony fishes, crustaceans, and cephalopods. These sharks are generally social, often found in groups during the day, but can hunt individually or cooperatively.
More marine life 48
Where is Richelieu Rock
Andaman Sea · Thailand