Cool, I didn't know another species of Coelacanth was discovered. I have to go with the Agnatha (Hagfish and Lampreys) as the most primitive fish besides the fishlike cephalochordates. The latter are filter feeders so they are not really predators. The Hagfish are scavengers of the deep sea and are found whenever a corpse sinks to the bottom. The fish can tie a knot at its tail and work it down quickly to its head to gain leverage to pull out a chunk of flesh. This is how it feeds.