Fish fishes underwater sealife ocean sea water 130. Ship wreck the catherine or the kathryn caverns just 10 minutes this is an old minesweeper which was sunk in 50 ft. Of water some time in the 1980s along a cavernous reef system. The bull shark carcharhinus leucas also known as the zambezi shark informally zambi in africa and lake nicaragua shark in nicaragua is a requiem shark commonly found worldwide in warm shallow waters along coasts and in rivers.