n.any of numerous sharks from small relatively harmless bottom-dwellers to large dangerous oceanic and coastal species
英汉双解大词典
requiem shark
1.
N（名词）
any shark of the family Carcharhinidae, occurring mostly in tropical seas and characterized by a nictitating membrane and a heterocercal tail. The family includes the tiger shark and the soupfin 真鲨科鱼; 多数在热带海域出现，特征为瞬膜和歪尾，其家族包括了虎鲨和油翅鲨