Fulfilling the role of the vulture, schools of piranha keep the river clean by consuming dead or injured animals, insects, snails, scraps and even plants. Their razor-sharp teeth can strip flesh from a large animal in minutes, but they themselves are commonly eaten by local people who use the fishes’ jaws as scissors.
Leptodactylus pentadactylus When threatened, they can secrete toxic mucus from their skin. If people touch this mucus, it can cause skin rashes, stinging sensations,…