Trapania tamaraw 
Trapania vitta 
Tridacna elongatissima 
Trinchesia acinosa 
Triton's trumpet 
Tritoniopsis elegans 
Tropical Gasflame 
Tropidauchenia proctostoma 
Tuberculous nudibranch 
Turbinate Monodont 
Two Lipped Door Snail 
Two-toned Pygmy Squid 
Tyrannodoris luteolineata 
Tyrannodoris nikolasi 
Unidentia sandramillenae 
Valiguna flava 
Variable neon slug 
Varicose Wart Slug 
Variegated Limpet 
Velutin snail 
Venus Comb Murex Snail 
Verconia alboannulata 
Victaphanta atramentaria 
Videna metcalfii