Spearfishing can be fun. But the dangers are greater than you have ever imagined. You might get tangled in fishing nets. You might encounter dangerous sea creatures, too. For your safety and convenience, it’s ideal for diving with a skilled buddy. Spearfishing causes shallow water blackouts. This happens when the brain does not receive enough oxygen. Anglers only have 2 minutes to take action before brain damage occurs. So, spearfishing with skilled spearos is advisable.