This book presents an innovative business model based on an Integrated Multi‑Trophic Aquaculture (IMTA) system applied to the marine aquarium sector, framed within the concept of sustainability‑led innovation. By integrating environmental, social, and economic goals into core business strategies, this approach aims to create shared value for ecosystems, communities, and markets. Through a combination of theoretical analysis and empirical research, the book develops a conceptual framework to guide the implementation of sustainability‑oriented innovations. A case study of an IMTA system illustrates how ecological synergies, circular economy principles, and market opportunities emerge when production models are reimagined through an integrated lens. The book also examines structural barriers, enabling conditions, and managerial implications, offering actionable insights to support the transition toward resilient, inclusive, and sustainable aquaculture business models.