Lined Seahorses swim upright using their dorsal fin for propulsion and pectoral fins for steering. They are slow swimmers. These seahorses are monogamous and form pair bonds, often performing daily greeting rituals. They are territorial, with males defending small areas. Lined Seahorses are generally peaceful and can coexist with non-aggressive, slow-moving fish. However, they may be outcompeted for food by faster species. They rely on camouflage to avoid predators, blending into their surroundings with ease.