Not much is known about the sailfin and observing them in the wild has become more difficult with their Vulnerable status in the International Union for Conservation of Nature (IUCN) Red List of Threatened Species. The reasons for this status are the usual for most endangered species: habitat loss and destruction and hunting for the pet trade. According to sailfindragon. com (an old website last copyrighted in 2005), the sailfin was exported for trade from the Philippines until 1994 when trade to the US was stopped. Soon after, it became illegal to export them to the rest of the world. Thus, any sailfins that make it to the international market these days are likely Indonesian varieties.
There are conservation efforts, of course. Arkive.org notes that Chester Zoo in Cheshire, England has a captive breeding program. There are also three local rescue and breeding centers in Negros and Panay to help establish local breeding, research, and education projects.