Upside-down Jellyfish

True to its name, the upside-down jellyfish swims upside down! Although it may look funny, this topsy-turvy sea jelly is actually doing this on purpose so that it can face its arms upwards towards the sun. Its ruffled arms house single-celled algae called zooxanthellae, which can capture sunlight to make food, just like plants! In return for sheltering them, the zooxanthellae share some of their food with their jellyfish home. And by swimming upside down, the upside-down jellyfish can maximise the photosynthetic power of its zooxanthellae buddies!

Although it gets food from its zooxanthellae friends, the upside-down jellyfish can still sting and capture prey that unwittingly bump into its tentacles. So, please do not touch the upside-down jellyfish to avoid being a victim of its venom!