The Norwegian University of Science and Technology invites applications for a PhD Candidate in Marine Biology and Aquaculture at the Department of Biology. The project is part of the research group Fish parasites, health and welfare and focuses on the behaviour and ecophysiology of sea lice and selected zooplankton species. The research will involve laboratory experiments using imaging and video detection, behavioural analysis, and programming-based data analysis. The project contributes to improving fish health and sustainable aquaculture. The successful candidate will join a collaborative research environment studying marine ecosystems and aquaculture challenges.