Lined Seahorse - Aquacultured - USAHippocampus erectus The Lined Seahorse is a peaceful, reef safe species admired for its unique appearance and captivating behavior. Its elongated body features prominent vertical dark lines against a pale background, giving it the signature lined look. With a prehensile tail and upright posture, this seahorse can anchor itself to coral, seagrass, or macroalgae, adding both charm and movement to any reef aquarium. In the wild, Lined Seahorses are found