Rotifers MAX (Liquid Rotifers Highly Concentrated 10 Million, Long Shelf Life, Economical) 8 Oz Rotifers (Brachionus plicatilis) are Microscopic Zooplankton, which makes them the Ideal Food for Corals (LPS & SPS), Baby Fish, and most Filter Feeders. Gut Loaded with Phytoplankton, Amino-Acids & Multi-Vitamins. Ultra Fresh & Concentrated at High Density (estimated 10 Million Rotifers in this Bottle). All Natural Product. Large 8 oz Bottle - Ready to Use - Refrigerated.