From the time they were born, baby seahorses are able to search for food by themselves. Seahorses are efficient hunters by nature and they hunt by sight. One of the observations made on seahorses kept in aquarium tanks is that they are often stimulated into feeding by the movement of their prey.
See those white specks around the baby seahorse? Those are nauplii – crustacean larvae which are a staple to their diet. Due to their lack of stomach to digest and store food properly, newborn seahorses need to consume at least 3000 of these specks in a day to keep on going. That is some huge appetite.