David Hall / Underwater cave with Soft corals (Nephtheidae), Cup corals (Dendrophylliidae), Black corals (Antipatharia), Dusky sweepers (Pempheris adusta), Soldierfish (Myripristis sp.) and Eyestripe surgeonfish (...

David Hall / School of Slender fusiliers (Gymnocaesio gymnoptera) swimming over coral reef with Sea fan (Melithaea sp.) and Soft corals (Sarcophyton sp.), Raja Ampat, Indonesia, Pacific Ocean.

David Hall / A coral reef scene with red Sea fans (Melithaea sp.) and Threadfin anthias (Pseudanthias huchti). Also present are hard plate corals, Wire coral (Cirrhipathes sp.), red Encrusting sponge (Porifera), B...

David Hall / Map puffer (Arothron mappa) swimming over coral reef with Soft corals (Dendronephthya sp.), Threadfin anthias (Pseudanthias huchti) and Damselfish (Pomacentridae), Raja Ampat, Indonesia, Pacific Ocean...

David Hall / False clown anemonefish (Amphiprion ocellaris) pair swimming around a Magnificent sea anemone (Heteractis magnifica) with Soft coral (Sinularia sp.), Branching hard coral (Acropora sp.) and blue Encru...

David Hall / Red lionfish (Pterois volitans) swimming over coral reef with Soft corals, from left to right (Dichotella sp.), (Sinularia sp.), (Nephthea sp.) and Hard coral (Acropora sp.), Raja Ampat, Indonesia, Pa...

David Hall / Mushroom coral (Fungiidae) mouth detail, Ambon, Indonesia, Pacific Ocean.

David Hall / Polyclad flatworms (Pseudobiceros sp.) pair, on seabed preparing to mate, Raja Ampat, Indonesia, Pacific Ocean.

David Hall / Polyclad flatworms (Pseudobiceros sp.) pair, mating on seabed, Raja Ampat, Indonesia, Pacific Ocean.

David Hall / Day octopus (Octopus cyanea) female, receiving a packet of sperm from a nearby male, whose specialized arm (hectocotylus) can be seen placing the sperm packet inside her mantle, Ambon, Indonesia, Paci...

David Hall / Mangrove roots with Soft corals (Dendronephthya sp.) and decaying mangrove leaves, Misool, Raja Ampat, Indonesia, Pacific Ocean.

David Hall / Mangrove roots with colorful Soft corals (Dendronephthya sp.) on seabed and Banded archerfish (Toxotes jaculatrix) swimming above near the surface, Misool, Raja Ampat, Indonesia, Pacific Ocean.