The densitiy of targetted invertebrates is evaluated using a belt transect (counting all the specimens in the 25 x 2 = 50m² belt transect), then the mean is computed using the 3 replicates per zone.
Targetted molluscs genus
| English name | Tahitian name | Scientific name |
| Small giant clam | Pahua | Tridacna maxima |
| Great green (marbled) turban | ma’oa taratoni | Turbo marmoratus |
| 7 fingers | Tara hitu | Lambris truncata |
| Horned helmet | Putara | Cassis cornuta |
| Commercial top shell | toroka | Trochus niloticus |
Targetted echinoderm genus
| English name | Tahitian name | Scientific name |
| Crown of thorns starfish (COTS) | Taramea | Acanthaster planci |
| Leopard sea cucumber | Rori | Bohadschia argus |
| Black sea cucumber (lollyfish) | Rori | Halodeima atra |
| Pineapple sea cucumber (prickly redfish) | Rori | Telenota ananas |
| Spotted worm sea cucumber | - | Synapta maculata |
| Collector urchin | Avae | Tripneustes gratilla |
| Diadema sea urchin | Vana | Diadema sp. |
| Blue-black urchin (warning also diadema sea urchin) | Vana | Echinothrix diadema |