The type classification within marine drug segmentation groups compounds by molecular architecture: Small molecules, Peptides, Polysaccharides, Alkaloids, Lipids, and Marine‑derived antibodies. Small molecules dominate due to their synthetic tractability and established regulatory pathways, contributing the bulk of revenue despite intense competition. Peptides, characterized by high specificity and low toxicity, are expanding rapidly, especially in oncology and metabolic disorders. Polysaccharides, such as fucoidans, provide anti‑inflammatory and anticoagulant activity, supporting a growing niche market. Alkaloids, exemplified by marine brominated structures, offer potent pharmacological actions but face supply constraints. Lipids, including omega‑3 fatty acids and unique marine phospholipids, underpin cardiovascular and neuroprotective segments. Marine‑derived antibodies, though emerging, promise high selectivity for oncology and autoimmune indications. Each type adds distinct value to the total marine drug market, with their proportional contributions influencing investment decisions and pipeline diversification across the sector.