The marsh known as La Marjal del Senillar, located next to the beach of L’Ampolla in the Teulada-Moraira area, is one of the most valuable ecosystems on the coast of La Marina Alta. Declared a Wildlife Reserve in 2004, it houses a population of fish called Spanish toothcarp (fartets in Valencian), in danger of extinction.

La Marjal is, more precisely, a small seawater pond along low beaches (or albufereta in Valencian), the product of the restoration carried out by the Town Council in 2002. Specifically, they are a set of lagoons separated from the sea by a sand barrier.

The waters come from springs that flow continuously throughout the year, and from the leftovers of the aquifer of the plain of Les Sorts.

Three areas can be distinguished: the lagoons (one hectare in extent), the banks, and the dune area, which has vegetation acclimated to the scarce existing nutrients.

The bank of the marsh is made up of plant species such as reed or cane, rush, bulrush and tamarisk. In the dunes, one finds sea holly, sea fennel, sea daffodil and marram grass.

Some species of fauna stand out in the marsh. The birds that can be seen are the common moorhen, the mallard and the Eurasian reed warbler; among the amphibians and reptiles: the common frog, the common toad and the viper. Some common fish are mullets, eels, and gambeta (shrimp), a crustacean endemic to the Mediterranean.

It is necessary to name the prohibitions that affect the marsh area: one cannot have a swim, snorkel, fish or sail.