prepare 4-6 Sonic Bombs, throw ar Cephadrome when it stops( note only works on [stop].. )
to get it out of the sand....
Position yourself on its right leg ( it only spin tail from left.. )

alls u need is 2 sonic bombs. 2-3 cool drinks and a good sword like the silver fang 2h
sword. when it goes around its stops somewhere specific and when it stops go there and
wait till it stops again and then slash till it dies

all you need to do is get it above ground and attack it on its leg and neck when it shoot
those sand thend and also when its under ground when it pops up to shoot it shoot longer
then other piscine so you can attack from the back then. and if your are having problems
getting it above ground use sonic bombs

all though that is true, once u have weakned it enough, it will flee to area 3 and when u
get there, u will find it has just started to rest, as soon as u see this, attack it,
preferably with ur g.sword, 4-6 hits and its dead