dwarfshark,whaleshark

要小于50厘米,侏儒额斑乌鲨(dwarflanternshark/etmopterusperryi)是
the smallest shark is thought to be the dwarf lanternshark (etm
poached shark
the earliest known sharks date from more than 420 million years
《矮人要塞(dwarf fortress)》