<P> Tourists also partake in the building of rafts on Lavnun Beach, called Rafsodia . Here many different age groups work together to build a raft with their bare hands and then sail that raft across the sea . </P> <P> Other economic activities include fishing in the lake and agriculture, particularly bananas, dates, mangoes, grapes and olives in the fertile belt of land surrounding it . </P> <P> The warm waters of the Sea of Galilee support various flora and fauna, which have supported a significant commercial fishery for more than two millennia . Local flora include various reeds along most of the shoreline as well as phytoplankton . Fauna include zooplankton, benthos and a number of fish species such as Acanthobrama terraesanctae . Fish caught commercially include Tristramella simonis and Sarotherodon galilaeus, locally called "St. Peter's Fish". In 2005, 300 short tons (270 t) of tilapia were caught by local fishermen . This dropped to 8 short tons (7.3 t) in 2009 due to overfishing . </P> <P> However, low water levels in drought years have stressed the lake's ecology . This may have been aggravated by over-extraction of water for either the National Water Carrier to supply other parts of Israel or, since 1994, for the supply of water to Jordan (see "Water use" section above). Droughts of the early and mid-1990s dried out the marshy northern margin of the lake . A fish species that is unique to the lake, Tristramella sacra, used to spawn in the marsh and has not been seen since the 1990s droughts . Conservationists fear this species may have become extinct . It is hoped that drastic reductions in the amount of water pumped through the National Water Carrier will help restore the lake's ecology over the span of several years . As such, the amount planned to be drawn in 2016 for Israeli domestic water use is expected to be less than 10% of the amount commonly drawn on an annual basis in the decades before the mid-2010s . </P>

What kind of fish is in the sea of galilee