Why do lined seahorses have long snouts with no teeth?

Seahorses have snouts so that they can probe into small nooks and crannies when searching for food. This means if their prey is hiding then the seahorses snout can squeeze into the hole or crack, and they can eat their dinner. It also helps because when they find food they suck it up through their snouts like a vacuum cleaner. Their snouts can expand if their prey is larger than the snout. They are not able to chew and have to disintergrate the food as they eat it.