This 10 pack is usually 6 or 7 females and 3 or 4 males. If I have many males in stock then I will match 5 and 5. these guys do great in shipping and are easy to care for.
Dwarf Sea Horse - Scientific name Hippocampus Zosterae
They are about an inch in size.
It may be best if these little guys are in a tank just for them so they do not have to compete for food. I recommend feeding them newly hatched brine shrimp with the Artemia species being the best quality. I would also suggest a tank with a low current and no coral. If they attach to coral it may burn them. Soft Corals (like Gorgonians) are safe.