   Sand-Swimming Creature (CR +0)  This simple template can only
be applied to creatures with the aquatic subtype. Sand-swimming
creatures swim through sand instead of water.  A sand-swimming
creature's quick and rebuild rules are the same.  Rebuild Rules:
Type lose the aquatic subtype, gain the earth subtype; Speed
replace swim speed with an equivalent burrow speed, gain earth
glide; Environment any desert.