The stonefish looks like a stone just like the reef that it lives on. lt also likes to sit on the sandy seabed. lt has spines though that it uses to defend itself. They are very sharp and contain a nasty venom which can be very painful and sometimes lethal. To avoid the stonefish is nasty sting you must not touch the reef while swimming and you should make sure you always wear shoes or sandals when walking in shallow sandy water