Fathead minnows are small freshwater fish commonly found in North America. They typically grow to about 3 to 4 inches in length and are known for their distinctive fat heads, which give them their name. These fish inhabit a variety of environments, including lakes, ponds, and rivers, and prefer shallow waters with plenty of vegetation. These minnows are often used as bait for fishing and are also popular in aquaculture. They play a crucial role in the ecosystem by serving as a food source for larger fish and wildlife. Additionally, fathead minnows are frequently used in scientific research due to their hardiness and adaptability.