Gelliodes gracilis

Gelliodes gracilis is a sponge belonging to the family Niphytidae, commonly found in the Western Central Pacific region, including Malaysia, Palau, and Indonesia. Divers can encounter this species at shallow depths ranging from 1 to 6 meters. As a sessile organism, it attaches itself to substrates in tropical waters, making it a common sight in areas where such conditions prevail. This species is a filter-feeder, extracting nutrients from the water as it passes through its porous body. Gelliodes gracilis plays a role in the marine ecosystem by filtering plankton and other small particles from the water. Like other members of the class Demospongiae, it is hermaphroditic, meaning individuals possess both male and female reproductive organs. The life cycle involves the development of a free-swimming parenchymella larva, which eventually settles on a substrate to grow into a mature sponge. Divers exploring the shallow tropical waters where Gelliodes gracilis resides may find it an interesting subject due to its ecological role and unique life cycle.