Predator-prey interactions : In experimental studies we examine the predation potential of predators and the prey behavior. In recent studies we have examined prey behavior in response to the presence of multiple predators.

Fauna of biotic habitats : Many marine organisms (corals, mussel beds, ascidian clumps, kelp forests) provide space for other organisms. In comparative and experimental studies we examine whether associated fauna itself contributes to the high diversity of biotic habitats.