This is a 283 piece wooden jigsaw puzzle of a gorgeous image (pictured below) by a young Mexican artist who goes by the name Nadiezda. The puzzle design is by Kathryn Flocken, and includes numerous sea whimsy pieces including a weedy seadragon, an axolotl, and angler fish (all pictured below). Connectors are shaped like stars and very-round knobs.
SPOILER ALERT: The puzzle edge is not straight, and the top edge is a starry sky. If you really want a spoiler alert, you can see a photo of the puzzle edge (and example pieces) if you go to the product image and click on the small photos below the main photo.