Marty’s photo of the day #4490: This long-spine porcupinefish is about 20 inches long. If frightened, it could swallow a large amount of water to inflate a pouch near its stomach, thereby doubling in size and raising spines all over its body. Deb and I didn’t see any of these fish during our first week of snorkeling in Bonaire. Once we discovered that they liked to hide under ledges in shallow water, they became easier to find.