This baby Lined Seahorse (Hippocampus erectus) is dwarfed by the seemingly gigantic pencil tip. The actual size of this cute little critter is no bigger than the head of a pin and is easy to be mistaken as a speck of dust at the top of the aquarium. So, if you happened to have a pair adult seahorses as pets, you might want to check on those tiny particles floating in your tank.