The Blue Explorer Divers Knife is the perfect beginner knife for spearfishers, freedivers, lobster divers or even just snorkellers. It's a pretty basic knife with some handy little features for both safety and ease of use.
The line cutter (the little dug out section of the blade near the handle) can come in handy if you ever need to quickly cut your float line or any other line if you get tangled in it or if it gets caught on the reef, a good feature to have especially for beginner divers.