Balancing the control that is possible with lab studies with the real-world applicability of field work is a challenge in all experimental work. Using the example of the relationship between temperature, metabolic potential and social behaviour in fish, I will explore ways to incorporate more field relevance into lab studies and take lab-based theory to the field. As ectotherms, temperature has been called the “master factor” for fish; playing a large role in setting metabolic potential which in turn influences many aspects of behaviour and physiology. For example, changes in temperature have the potential to shift the cost-benefit analysis fish must conduct to balance the benefits of remaining in a group with the costs of increased competition. However, when considering the complexities of the natural world this relationship becomes less straight forward.