Two juvenile sharks were spotted in Hoi Ha Wan Marine Park again yesterday, the fourth such sighting in the area. An Agriculture, Fisheries and Conservation Department staffer saw a shark about 60cm long in Hoi Ha Wan Marine Life Centre, Sai Kung, at 4.30pm. Another juvenile shark about 120cm long was seen nearby soon after. The public has been urged to refrain from any water-based activities in the park for the time being, even in shallow water. Two juvenile sharks were spotted on June 29 by a member of the public.