There are two distinct types of fish known as kingfish. The first is actually the regional name for a king mackerel. The name of the second type, found along the Atlantic coast, applies to any of several species of drum.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.