Delicious Sea Cucumber Premium Seafood Ad

[Format] Professional e-commerce product main image, square 1:1, premium seafood-ad style set deep underwater, one glistening hero product with punchy promo chrome. [Colors] Deep ocean blue gradient (#0a4d8c to #021f3d) with light rays; white display type; a teal-green round badge (#1f9d55 range); a bright red bottom strip (#d62828). No frame border. [Layout] A small logo chip sits top-left; the headline spans the top; the sea cucumber bursts through a water splash in the centre; a green circular badge sits lower-left; a red bar runs along the bottom edge. [Subject] Centre: a single glistening sea cucumber with bumpy dark-brown skin, leaping above a crystal-clear water splash with droplets and bubbles frozen mid-air; strong underwater light beams glow behind it. No people. [Headline] Top: "Delicious Sea Cucumber" in very heavy white display caps; lower-left inside the green circle: "Buy 3 Get 1 Free" stacked in white; the red bottom bar carries "Instant $100 Off With Coupon" in bold white with yellow accents. [Mood] Fresh, premium and appetizing; deep-sea blue with bright splash highlights and urgent promo red.