Four meters down. More than half a meter across.
Inside billions of microscopic photosynthetic algae called zooxanthellae create 90% of the nutrients directly from sunlight to feed this clam.
As I place my hand above the clam to show its true scale, pinhole-like light sensors called ocelli see the change in light.
In an instant, the clams excurrent siphon shoots out a jet of water.
Both a handshake, and a polite request; to leave.
At about 25 years old, this Giant Clam has about another 75 years.
Hope to have another handshake in 50ish years time.
