Personalized Jellyfish Jellies Sea Creatures Long Sleeve T-Shirt. A school of jellyfish in pastel colors on a cute Long Sleeve T-Shirt - Pink sea creature themed gift, great for National Oceans Month. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL