Injuries caused by black sea urchins were the most common among those caused by marine animals in bathers. The unique species was Echinometra lucunter, which is not venomous. The penetration of spicules occurs mainly in the plantar regions and is a significant traumatic factor, with the possibility of secondary infections and foreign body granulomas. The use of No. 10 (watchmaker's) forceps was equivalent to the needle method but much less painful and traumatic. The creation of leaflets and the placement of posters at beaches with sea urchin colonies could prevent these wounds and should be attempted by the City Councils of coastal cities.
Vidal Haddad (Thu,) studied this question.