California Blackworms (Lumbriculus Variegatus), most commonly referred to as just blackworms, are a popular tropical fish food. In addition to feeding them to my betta fish, I have used them as the primary food for my Dwarf Puffers and Gouramis. These worms are fed live and while they can be impossible to find at large chain pet stores like PetCo and Petsmart, they are often … [Read more...] about Preparing and Feeding Blackworms to Tropical Fish