Do sharks eat duckweed

The answer would be yes and no. Generally there are many different animals that do eat duckweed, ducks, carp, etc. However, Duckweed, (most notably native to California) is more often found in fresh water in ponds or lakes. There are also three main types of Duckweed, Lemna, Wolffia, and Spirodela. Each of course being slightly different than the other. Duckweed was often noted as being a good source of calcium, but the calcium make-up is sometimes unusable, especially by humans, mostly depending on the environment in which it is grown. Water content changes the content of the Duckweed. It is often said that it is better to eat that which eats the duckweed. So for as far as sharks go, they do not specifically eat duckweed (this includes the algae and shrimp eaters), however they would certainly benefit from it if it were injested.