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Hippos spend about 16 hours a day in the water. While awake, they can hold their breath for up to five minutes. While they sleep in the water, they surface automatically and breathe without waking up. Hippos can’t survive for long out of water because their skin is extremely sensitive to direct sunlight, which is why they secrete a red, oily substance, once thought to be blood, that serves as both a sunscreen and an antibiotic. https://www.nathab.com/blog/six-surprising-facts-about-hippos-africa/Size 700 x 526, 54 KB. Landscape 4:3