Isn't it because the light doesn't reflect back into your eyes, but from another direction so you can clearly see the fish?
(:
It looks like you're asking about spear fishing (the sport), not spear phishing (the cyber attack). In spear fishing (the sport), the common equipment includes: Spear gun or pole spear – to catch fish Wetsuit – for thermal protection Mask and snorkel – for underwater visibility and breathing Fins – for efficient swimming Weight belt – to help with buoyancy control Dive knife – for safety and utility Gloves and booties – for protection
They also used it for fishing
Spear fishing is done with a spear & regular is done with a rod/reel w/ fishing line & you catch the fish on a hook with bait.
Could be a gigging pole, or gig for short. A gigging pole can have several prongs and is used mainly for river fishing and frogging.
they used the spear to hunt animals
If it's legal, a spear gun can be used.
Harpoon or just spear A Harpoon. here in Missouri we call them gigs. this is freshwater fishing tho. we also don't call it fishing when using a gig, we call it gigging, or going gigging as apposed to fishing or going fishing. also works great on frogs.
A good fisher would not throw his spear at a fish because they have a chance of 1. Losing the fish and the spear when throwing the spear, 2. Good fisherman wait until they have the best chance to hit the fish, and 3. A good fisherman would never throw their spear unless if they could not hit the fish with the spear in their hands.
Because he was fishing with his fishing spear
They would have probably gone spear fishing, either with a spear or a branch which they would have sharpened with a knife.
a harpoon
water bends in light because of refraction which causes fish to seem a little off than where they appear to be. Because of this fisherman need to know where to position their hooks when they can see fish