One Tree Reef. Sea star - closeup of arms.

One Tree Reef. Sea star closeup of tube feet.

One Tree Reef. Sea star.

One Tree Reef. Sea star.

One Tree Reef. Sea urchin (Echinometra mathaei).

One Tree Reef. Sea urchin (Echinometra mathaei).

One Tree Reef. Soft coral.

One Tree Reef. Soft coral.

One Tree Reef. Soft coral.

One Tree Reef. Soft coral.

One Tree Reef. Soft coral.

One Tree Reef. Crinoid on soft coral (possibly Subergorgia sp.).

One Tree Reef. Crinoid on soft coral (possibly Subergorgia sp.).

One Tree Reef. Coral.

One Tree Reef. Coral.

One Tree Reef. Colonial tunicate.

One Tree Reef. Heteroxenia sp. soft coral.

One Tree Reef. Heteroxenia sp. soft coral.

One Tree Reef. Dot and dash butterflyfish (Chaetodon pelewensis).

One Tree Reef. Dot and dash butterflyfish (Chaetodon pelewensis).

One Tree Reef. Dot and dash butterflyfish (Chaetodon pelewensis).

One Tree Reef. Long-beaked coralfish (Chelmon rostratus).

One Tree Reef. Long-beaked coralfish (Chelmon rostratus).

One Tree Reef. Long-beaked coralfish (Chelmon rostratus).

One Tree Reef. Threadfin butterflyfish (Chaetodon auriga).

One Tree Reef. Pacific double-saddle butterflyfish (Chaetodon ulietensis).

One Tree Reef. Reticulated butterflyfish (Chaetodon reticulatus).

One Tree Reef. Long-beaked coralfish (Chelmon rostratus).

One Tree Reef. Keyhole angelfish (Centropyge tibicen).

One Tree Reef. Keyhole angelfish (Centropyge tibicen).

One Tree Reef. Keyhole angelfish (Centropyge tibicen).

One Tree Reef. Cardinalfish and Keyhole angelfish (Centropyge tibicen).

One Tree Reef. Keyhole angelfish (Centropyge tibicen).

One Tree Reef. Keyhole angelfish (Centropyge tibicen).

One Tree Reef. Keyhole angelfish (Centropyge tibicen).

One Tree Reef. Cardinalfish and Keyhole angelfish (Centropyge tibicen).

One Tree Reef. Cardinalfish and Keyhole angelfish (Centropyge tibicen).

One Tree Reef. Parrotfish feeding on Heteroxenia sp soft coral

One Tree Reef. Goldlined blenny (Meiacanthus sp.)

One Tree Reef. Two cardinalfish species

One Tree Reef. Fish's eye and gills betray its presence hiding in coral and algae.

One Tree Reef. Coral and yellow spones or tunicates.

One Tree Reef. Humbug dascyllus (Dascyllus aruanus).

One Tree Reef. Humbug dascyllus (Dascyllus aruanus).

One Tree Reef. Humbug dascyllus (Dascyllus aruanus).

One Tree Reef. Queensland dottyback (Ogilbyina queenslandiae) feeding on dead fish.

One Tree Reef. Queensland dottyback (Ogilbyina queenslandiae)

One Tree Reef. Queensland dottyback (Ogilbyina queenslandiae) feeding on dead fish.

One Tree Reef. Queensland dottyback (Ogilbyina queenslandiae) feeding on dead fish.

Rainsford goby (Amblygobius rainfordi)