The Family Sisyridae includes a group of insects more commonly known as spongillaflies. They are a small family consisting of only two genera and around 40 species. Sisyridae are characterized by their unique feeding habits, as they feed almost exclusively on freshwater sponges. The larvae of these insects have flattened, paddle-like structures on their abdominal segments, which they use to move through the water. Additionally, spongillaflies have long, slender bodies and four wings. Some synonyms for the Family Sisyridae include the "spongilla fly" and "spongefly," highlighting the insects' reliance and specialization on freshwater sponges as their primary food source.