Ages 6 to 10 years. Did you know that a tiny sea jelly the size of your fingernail can kill a person? Oceans are filled with some of the most colourful creatures alive --and some of the deadliest! Young children will be thrilled by the animals featured in this exciting ABC books with identifies everything under the sea, from colourful nudibranchs, sea cucumbers, and clownfish to deadly electric eels, stingrays, great white sharks, and sea jellies.