Complex sentence: Nevertheless, flower urchins are still considered highly dangerous, as the severe debilitating pain compounded by muscular paralysis and disorientation can result in accidental drowning among divers and swimmers.
Split into simpler sentences: Nevertheless, flower urchins are still considered highly dangerous. The severe debilitating pain of the flower urchin sting compounded by muscular paralysis and disorientation can result in accidental drowning among divers and swimmers.