Fishing From Ribs
I've been fishing from my 4m Zodiac both in fresh water and salt water for 20 yrs and have never had a problem with fish spines or hooks.
You simply have to take simple precations such as never let loose hooks to lie around the boat. When you bring a lure in, bring it in away from the boat.
When you net a big fish, place it in the center or the boat, club it, place inside a cooler then have a beer!
My boat, though small, gives me great stability to stand and play the fish.
If you're going after marlin then that''s another story.