Here's a breakdown of what they do:

* Taxonomists: Classify fish based on their physical characteristics and genetic makeup.

* Ecologists: Study how fish interact with their environment and other organisms.

* Physiologists: Investigate how fish function internally, including their breathing, reproduction, and movement.

* Behaviorists: Observe and analyze fish behavior, such as mating rituals, feeding habits, and social interactions.

* Conservationists: Work to protect fish populations and their habitats from threats like pollution, overfishing, and climate change.

* Aquaculturists: Develop sustainable methods for raising fish in controlled environments for food.

Ichthyologists can work in a variety of settings, including:

* Universities: Teaching, research, and publishing.

* Government agencies: Managing fisheries and wildlife resources.

* Aquariums: Research, education, and public outreach.

* Private companies: Aquaculture, consulting, and environmental impact assessment.