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Altamaha flathead catfish Did you know… What is an invasive species? Look, another BIG Appaloosa! Historically, flathead catfish, or Appaloosas, only occurred in Georgia’s Northwestern corner (Coosa River). However, flathead populations now live in many Georgia rivers, including the Altamaha. Introducing fish into non-native rivers can have long-lasting ecological consequences. …. An invasive species is any species that is not native to an ecosystem and whose introduction is likely to cause economic or environmental harm, or harm to human health…. Florida Fish and Wildlife Conservation Commission Flathead catfish description flattened head unforked tail Do you know these famous invaders? protruding lower jaw Flathead catfish Green porcelain crab Titan acorn barnacle Snakehead Zebra mussel Red lionfish Green mussel = Native Georgia flathead populations (shaded blue) and areas where they’ve been introduced (shaded red) in Georgia mottled colors vary from grey to yellowish brown Altamaha flathead catfish THE GOOD Although flatheads are not a native species, they have become an important social and economic resource by providing food and recreation. Anglers come from miles away to fish for these beasts. Since they can potentially weigh up to 100 pounds, they have also become a valuable trophy fish. THE BAD THE UGLY Flathead introductions have had negative ecological impacts in many areas: they have the potential to alter the delicate balance between predators and their prey. Flatheads are voracious predators known to eat redbreast sunfish, channel catfish, bullhead catfish, and many others. A face only a mother could love: a flattened head, yellowish skin that is mottled with brown and green, a lower jaw that extends beyond the upper jaw, small eyes, and an unforked tail. Mussels in trouble Mussels aren’t the flashiest creatures in the world, so you might not have heard that they are now the most imperiled animals in North America1. Many species are declining as a result of land use practices, damming of rivers, and the introduction of non-native species, such as flathead catfish in the Altamaha River. Rare Mussel Reproduction (2) Successful glochidia turn into juveniles & become free living mussels. …. An endemic species is unique to its own place or region; it is found only there, and not found naturally anywhere else. (1) Eggs develop into glochidia, (glow-kid-ee-uh) which look like PacMan. They need to find a fish and attach to the gills or fins to survive. Adapted from: http://animaldiversity.ummz.umich.edu The flathead connection Hostess with the Mostest? Mussels rely on specific fish to complete their lifecycle. Baby mussels must attach to a host fish’s gills or fins. If they can’t find their host, they will die. Scientist are working to match each fish host with the mussel species that depends on it. While potential fish hosts remain a mystery, we know that flatheads eat them all. When invasive predators like flathead catfish eat native fish, this could cause big problems for local mussels. What is an endemic species? In Georgia, seven endemic mussel species occur in the Altamaha River Basin. Do you know these native mussels? Altamaha Lance Altamaha Spinnymussel Altamaha slabshell Altamaha Arc-mussel Georgia Elephant Ear Altamaha Pocketbook Inflated Floater