Grindal worms are small white worms that are great for feeding small fish. Our starter culture comes with worms and complete instructions for growing your own Grindal worms in potting soil. Grindal worms are easy to grow, live in our soil less bedding or in regular potting soil. They are great for rearing fish fry and small amphibians. Try a starter culture today. Shipped via USPS Priority Mail. Shipping is free for Live Grindal Worms.