Scientific Name: Spondylus varius
Common Name: Variable thorny oyster

Size: 7 – 15 cm
Depth Range: 3 – 50 m
Habitat: Found attached to coral reefs, rocks, and other hard substrates in lagoons and reef slopes
Diet: Filter feeder; feeds on plankton and suspended organic matter
Reproduction: Separate sexes; release eggs and sperm into the water column for external fertilization
Fun Fact: This colorful bivalve is easily recognized by its spiky, often vividly colored shell, which provides camouflage and protection from predators.

Observation Tip: Look for them attached to rocks or corals in reef environments. Their shells can be orange, red, purple, or even multicolored—making them a visual highlight of the reef!