We live in one of the canals of Amsterdam. Like most people, we have a small boat in front of our house, to sail around the city. During Winter times we bring it away to protect from damages, if exposed to harsh temperatures at frozen canals.
We moor the boat to wooden polls, which we also remove from the water and place at the deck. This time we noticed some freshwater shells on the polls.
I shot these photos of the shells yesterday with an iphone5.
We are used to seeing sea shells but there are shells found in freshwater habitats, which are mussels shells, snails shells and land snails shells. I am not a conchologist, so I cannot identify which one is this but I suspect that it may be a mussel shell, as there are many in our waters.
Fresh water shells are members of two major classes i.e. Gastropoda (gastropods) and Bivalvia (bivalves). They occur in both calmer waters (e.g. ponds, small lakes, still waters near river and stream banks) and running waters (brooks, small and larger rivers, in breaker zones of lakes).
The extent of a habitat is less important than the quality of preferred feeding area. Bivalves for example prefer a habitat with mud. Larger waters are richer in species, as smaller ones don’t always survive for a long time.
A shell is a protective outer layer created by an animal and is part of the body of the animal. The shells are empty because the animal has died and the soft parts have been eaten by another animal or have rotted out.
I was happy to find them as this is a sign of clean waters.
I hope you liked to know more about shells.
I am submitting this post to Lens and Pens by Sally, who hosts each Monday the Phoneography and Non-SLR Digital Devices Photo Challenge. Following the link you will learn all you need to participate. Give it a go.
The scheduled theme for this week’s challenge is: Nature.