Dive Medicine: Sea Urchin Puncture Wound: Sea urchins are non-aggressive marine animals and have spines and pedicellaria (venomous organs). Symptoms include redness and swelling around the area or fatigue, muscle aches, weakness, shock, or respiratory failure if the puncture wound is deep. Treatment of sea urchin puncture wounds are removal of th spines and pedicellaria. Antibiotics may be necessary if infection occurs.