DanDan

A dandan or dendan is a mythical sea creature from The Book of One Thousand and One Nights appearing in the tale "Abdullah the Fisherman and Abdullah the Merman", where a merman describes the dandan as the largest and fiercest fish, capable of swallowing large animals in a single mouthful. The fat of the dandan, described as "fat of oxen, yellow as gold and sweet of savour," is used like an ointme... (Wikipedia)