This surprisingly simple crochet mermaid tail blanket is made using almost entirely double crochet stitches, including some worked in the back loop only. The ruffles at the top add a creative flair to the design and also help to keep you comfy as you use the blanket. This free crochet blanket pattern is made using self-striping yarn. It comes in five sizes for all ages, and it is available as both a written pattern and a video tutorial. It begins with a magic ring, and there are links to tutorials for those who aren't familiar with starting in the round using that technique.

Crochet Mermaid Tail from B.Hooked Crochet