The spengler’s freshwater mussel is an specie of freshwater bivalve mollusk that it currently only known scientifically confirmed the presence of populations living in the Ebro basin. Is originally from the big atlantic and mediterranean rivers from occidental Europe and North Africa.

It is a mollusk in the shape of a clam, that is, is a bivalve. It grows to 20 inches, live up to 80 years and lives in fresh water. It has a extremelly thick and heavy shell,blackish, looking Curb as an human ear.

The little amount of spengler’s freshwater mussel is found actually distributed in channels with clean water forming isolated colonies located in shallow beaches with gravel bottom consolidated and well ventilated. Its natural habitat is the funding of gravel, mud, sand, silt and stones, where itlives half-burried. Formerly major banks was shallow and also accumulates in deep pools of rivers by the drag characteristic of the dynamics of river.

Specifically malacologists only aware of the presence of this species in the province of Zaragoza and Tarragona.
In Zaragoza are known colonies in the Imperial Channel( where there are more or less two thousand of them). In Tauste Channel and in the area of Sastago in the Ebro river, without quantifying. In Tarragona there are know colonies in the final stretch of the Ebro.

The species can not be played since before 1970 and has over 30 years waiting for their own extinction. The fertility of the spengler’s freshwater mussel is huge. So, why it can not reproduce? This species of mollusk is multiplied by a larvae-called glochidia, which discharged into the river water. But the complexity of the reproduction of the nymph is that the larvae can only develop if they remain a part of their life cycle entrenched within the guts of a small number of fish species. One is the Atlantic sturgeon disappeared from the waters of Ebro does exactly the same time he has not played the Naiad. The other species is the pitch blenny monk, who is on the verge of extinction due to pollution of water and sand and gravel extraction of funds from the Ebro River.