Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Fragilaria crotonensis is a well-known species of planktonic diatom within the genus Fragilaria, commonly found in freshwater lakes across North America and other temperate regions.
Public Domain.
