Macroalgal blooms develop during the spring-summer period in the Barnegat Bay–Little Egg Harbor Estuary, a highly eutrophic coastal lagoon in New Jersey, and these blooms are detrimental to seagrass habitat in the system. Recurring blooms of drifting red and green macroalgae (e.g., Gracilaria tikvahiae and Ulva lactuca) attenuate or block light transmission to seagrass beds and also produce ext...