Non-native fish have invaded and altered freshwater ecosystems around the world. Many of these species are popular gamefish that have been purposefully introduced beyond their native range to enhance local fishing opportunities. However, the...
In many coldwater rivers and streams around the world, nonnative trout have altered the aquatic ecosystem. In the late 1800s, widespread trout stocking became commonplace and various trout species were introduced outside of their...
Asian shore crabs (Hemigrapsus sanguineus; Figure 1) are a small species of crab that live in rocky intertidal habitats along the coast. Native to eastern Asia and the Japanese archipelago, these crabs have inadvertently...
Snorkellers and divers exploring warm tropical waters often encounter a mesmerizing fish species known as a lionfish (Pterois spp., Figure 1). They may look beautiful with their feathery fins and striped pattern, but lionfish...
Guest Blog by Ben Armstrong, New Mexico State University Removing invasive fish species to aid native fish populations is easier said than done. System-wide removal of invasive fish with current removal methods (i.e., electrofishing,...
One of the most challenging periods of a fish’s life is centered around reproduction. Many species approach reproduction through nest building. It is generally the males that are tasked with finding territory, building a...
Green crabs (Carcinus maenas) are a relatively small species of crab that live in intertidal zones and shallow coastal waters (Figure 1). They are native to the Atlantic coast of Europe and North Africa...
In many coldwater streams in North America, nonnative trout are replacing native trout populations through hybridization, competition, and predation. Brook trout (Salvelinus fontinalis; Figure 1) are a species native to eastern North America. Throughout...
Imagine diving into a cool body of water after exercising or working in hot weather. This is an example of behavioral thermoregulation—changing your actions in order to influence your body temperature. Freshwater fish do...
Imagine a large, suction-like mouth ringed with pointy teeth that seeks out flesh to latch onto and draw blood from. In this case, I’m not describing vampires or other fantasy creatures. I’m describing a...
