This book provides a comprehensive and analytically rigorous exploration of the sensory systems of fishes, examining how they perceive, process, and respond to diverse aquatic stimuli. It brings together insights from neurobiology, physiology, and behavioural science to explain the functional organisation of sensory pathways and their role in survival and adaptation. Emphasis is placed on visual, chemical, and neural mechanisms that enable fishes to interpret environmental signals, locate food, avoid predators, and interact within complex ecosystems. The text also considers the influence of ecological pressures and toxic substances on sensory performance and behavioural responses, offering a nuanced understanding of how external factors shape perception. By integrating empirical evidence with theoretical frameworks, the book highlights the relationship between sensory function, cognition, and evolutionary development in aquatic organisms.

Furthermore, the book addresses higher-order responses, including learning capacity, perception of pain, and adaptive behavioural strategies. It is designed as a valuable resource for researchers, advanced students, and professionals interested in fish biology, sensory ecology, and the broader dynamics of organism–environment interactions.