A shoal of longspine glassies (Ambassis productus) within a shipwreck off the coast of Bongoyo Island. These small, oblong fish have an almost translucent appearance when seen underwater. Longspine glassies are not active fish, often remaining motionless in mid-water for long periods. This habit of ‘hanging in suspension’ enables them to feed almost exclusively on plankton, filtered from the water with their long gill rakers. The longspine glassy’s inactivity would seem to make them vulnerable to predators, but this danger is somewhat offset by their inconspicuous, translucent bodies and shoaling habits.