(1.5 Lec, 1.5 Discussion) Biology and ecology of deepsea organisms and communities. Topics including bentho-pelagic coupling, depth zonation, energetics, diversity, adaptations, hydrothermal vents, seamounts, abyssal plains, deep-sea resource extraction and global climate change. A-F only. Pre: 201 and BIOL 265, or consent. (Alt. years)