Macroalgae Farms is an online retailer focused on aquacultured macroalgae and supplies for saltwater and reef aquariums. The company grows macroalgae at its farm and offers green, red, and rare blue varieties for nutrient management, refugiums, and reef tank care. Its macroalgae selection includes Chaetomorpha, a refugium option for aquarium keepers.

The store also sells a broad range of marine life, including corals, saltwater fish, anemones, shrimp, snails, sea urchins, and other decorative invertebrates. Customers can browse clean-up crew animals and products such as algae-eating urchins and pest-eating snails, alongside corals and fish in varied colors and types. Macroalgae Farms features new arrivals, weekly promotions, sale items, and a WYSIWYG vault, where listings present individual specimens.

It serves retail customers through its online shop and offers wholesale purchasing for approved accounts, with automatic discounts available on qualifying orders. The website also provides shipping and policy information, including a dead-on-arrival policy and a process for submitting claims