I use one of these:mazman wrote:what sort of spear do you use looking at getting into spear fishing.
http://www.divein2scuba.com/index.php?_ ... ductId=404
You don't want to use a speargun out of the water for floundering, too dangerous!
If you are wanting to get into spearfishing, as in using a mask and snorkel and going underwater, I would suggest starting with the hand spear first and getting good at the diving aspect before introducing a high powered speargun into the equation.
I have a carbon fibre Torelli Taipan speargun which retails for about $700, plus other trick gear like camo wetsuit etc. Start off simple and cheap to try it before investing in the serious gear.