Interest in oceanography and marine biology and the relevance of those fields to global environmental issues creates a demand for authoritative reviews that summarize recent research. Oceanography and Marine Biology: an Annual Review is a yearly consideration of basic areas of marine research, returning to certain topics in future volumes and adding new topics as they arise. The series is essential for researchers and students in all fields of marine science, so it finds a place in the libraries of marine stations and institutes as well as universities. This edition adds commentary on exotic mollusks in the Mediterranean, the diet of harbor porpoises and other topics.