Freshwater clams are indeed edible, however; you may want to check the pollutant levels in the lake, if the fish are alright to eat from the lake, then the clams will be also.
Food and drink
Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism and assimilated by the organism's cells in an effort to produce energy, maintain life, or stimulate growth.
Historically, people secured food through two methods: hunting and gathering, and agriculture. Today, most of the food energy consumed by the world population is supplied by the food industry.
Pacific razor clam
Freshwater bivalves are one kind of freshwater molluscs, along with freshwater snails. They are bivalves which live in freshwater, as opposed to saltwater, the main habitat type for bivalves.
The majority of species of bivalve molluscs live in the sea, but in addition, a number of different families live in freshwater (and in some cases also in brackish water). These families belong to two different evolutionary lineages (freshwater mussels and freshwater clams), and the two groups are not closely related.
The Pacific razor clam, Siliqua patula, is a species of large edible marine bivalve mollusc in the family Pharidae.
Fried clams are made by deep frying clams that have been dipped in milk and then flour.
Fried clams are an iconic food, "to New England what barbecue is to the South". They tend to be served at seaside clam shacks (roadside restaurants). For a lighter meal, a clam roll is made by piling clams into a hot dog bun. Tartar sauce is the usual condiment.
Hospitality is the relationship between the guest and the host, or the act or practice of being hospitable. This includes the reception and entertainment of guests, visitors, or strangers.