A master of disguise, the pygmy seahorse (Hippocampus bargibanti) grows to only 2 cm in length and matches the gorgonian coral that it lives on. The pygmy seahorse is so successful at hiding that it was not discovered until its home was being studied in a lab.
It hides it’s deceit as it grows. Under its lemon exterior it is only muscles and hate
See that little white line on the adult’s tail? That’s a tiny knife made out of bone. There’s one on each side, and the knives can be used to cut competitors and potential predators.