I have had live aquariums in the past but they are just so much work, and eventually my fish died. I saw online that people were crocheting sea creatures and other things from under the water. I had an empty aquarium so I put it to use by making my own creatures. I got a lot of the patterns off line by looking for free patterns and in a book I purchased called 75 seashells, fish, coral and colorful marine life to knit and crochet.some of the coral were made by crocheting in the round and double or triple crochet around the single crochet and more than one stich in a single crochet. I used a lot of left over yarn this way too. I love it, I find it relaxing.