The zebra mussel is a species of small freshwater mussel, an aquatic bivalve mollusc. This species was originally from the regions of the  Black, Aral and Caspian seas but it has been accidentally introduced in many other areas as the Ebro River, and has become and invasive specie.

The zebra mussel has a triangular shape and in their shell it has dark grey and black stripes. It could be 5cm long but usually it is 3cm, and it could live 5 years. They live grabbed in the soil thanks to some “strings” (byssal threads) so it is very difficult to remove them. They grab in the rocks of the rivers, in pipes (collapsing them, so they have to be changed more frequently and more money is spent), boats and on the shells of other animals, not allowing them breath and eat, so they die. The zebra mussels filter the water so as it has less particles more light pass trough it, making plats grow and, as they need oxygen, less oxygen can be taken from fish so they also die.

The zebra mussel is an alloctone species in Aragon and it is changing the plants and animals of these rivers, and also the relationships between the humans and the nature because we have taken it here, and because it will be our job to take it out.

The cycle of cebra mussel's life

This is the cycle of the life of the zebra mussel

The characteristical stripes of the shell of the zebra mussles.

How the zebra mussels grab anywhere they can.