John Nathan Cobb the preeminent fishery scientist of the Pacific Northwest for nearly 40 years. Thompson had offices in the College of Fisheries where, since 1925, he was Director of the International Fisheries Commission (now International Pacific Halibut Commission) charged with the management of, and research on, the Pacific halibut, "Hippoglossus stenolepis", fishery. A Ph.D. from Stanford University, Thompson was appointed Research Professor and Director of the new department on a part-time basis, as he remained Director of the International Fisheries Commission. He remained Director of the School until 1947 when he resigned to establish and head the UW's new Fisheries Research Institute.
Fish anatomy and various processes which project from the centrum or arches. An arch extending from the top of the centrum is called a neural arch, while the hemal arch or chevron is found underneath the centrum in the caudal (tail) vertebrae of fish. The centrum of a fish is usually concave at each end (amphicoelous), which limits the motion of the fish. This can be contrasted with the centrum of a mammal, which is flat at each end (acoelous), shaped in a manner that can support and distribute compressive forces. The vertebrae of lobe-finned fishes consist of three discrete bony elements.