On 20 January, the fuel oil began to spill from Jessica. Recovery attempts began immediately, with the Ecuadorian Navy, the GNP, and local fishermen and volunteers containing and recovering the oil from the ocean surface. Oiled animals were attended to. On San Cristóbal, seven Galápagos sea lions and 17 birds (brown pelicans and blue-footed boobies) were affected by the fuel oil spill. On Santa Fe Island, a number of sea lions were affected and the marine iguana population was greatly reduced.
Due to lack of equipment and conditions at sea, the containment measures failed, and slicks drifted with the wind. A small beach on the southern side of Santa Cruz Island, as well as Tortuga Bay, were affected. The United States Coast Guard assisted in recovering the fuel oil remaining aboard the ship. A total of 175000USgal of diesel and fuel oil spilled into the sea; this was one of the worst environmental disasters in the archipelago's history.