Amphipods are curious little critters – with over 9,900 species described worldwide! Some in the UK include sandhoppers, which can often be seen jumping through the seaweed washed up on the shore. Although they may look like little aliens, a good way to think of them are like woodlice but instead of being squashed so they lay on their belly, they are squashed at the side so they are thin. They love to live under rocks or in the sand on the sandy shore – you can learn more about them in this video.