The conservation and sustainable management of fish populations are critical to ensure the health of aquatic ecosystems and the livelihoods of millions of people worldwide. Law plays a crucial role in achieving this goal, but it also faces numerous challenges and gaps. This paper examines the role of law in the conservation of fishes, including its successes, limitations, and the recommendations for improvement. We analyze international, regional, and national laws, identifying key gaps in their implementation, enforcement, and effectiveness. We also examine the impact of climate change, overfishing, habitat destruction, and other anthropogenic factors on fish populations and the challenges they pose to the legal frameworks. Finally, we propose recommendations for addressing the gaps and challenges in fish conservation laws to promote sustainable fishing practices and protect fish populations and their habitats.