Despite being the favourite worry of most travellers, this matter doesn´t deserve as much attention as it is generally paid to it. Indeed, you have by far more chances of suffering a sprain than of being fatally hurted by a wild animal. That said, we would be liying you if we said that the risk is zero. In the ocean in particular some creatures are definitely worth a mention. Box jellyfishes, for instance, are a serious threat to be taken into account. They are seasonal, but even during high-density season stings are rare and chances of being stinged can be reduced by using thick, long-sleeve swimwear. Cryptic venemous animals, such as stone fishes, sting rays and blue-ringed octopuses, are a more real threat in that they can be easily trampled, since they rely on their camouflage and remain stationary when aproached. A similar problem arises with fire sea urchins and urchins, anemones, and corals in general. In these cases, wearing watershoes in shallow water can prevent most bites. Sea snakes have a terrible reputation, but indeed they are non-agressive, tend to avoid contact with humans and eventually their bites are rarely fatal. For them, like for lionfishes and other striking venemous animals, it will generally be enough to follow a non-touch policy. Regarding large predators, sharks are extremely rare and encounters typically involve species that are not dangerous for human being. Saltwater crocodiles have become extinct in the shores of northeastern Palawan, as far as it is known. No sightings have been reported in decades.
Both in the rainforest and the mangrove, try to move through by minimizing contact with the environment. Most of dangerous creatures there, mainly including biting ants, centipedes, caterpilars and snakes, will ony bite you if they are accidentally grabed or trampled, or if they feel they are being directly chased by you. Again, a non-touch policy will work well. Watch your hands and steps at all times and check the ground thoroughly before sitting if you are going to take a rest. Close your bag if you are not using it and always wear long-sleeve clothing and proper shoes. Don’t shake the young trees and vines, as they may have wasp or bee nests on top, or may make the canopy to collapse, throwing its stinging inhabitants right into your head.