Giant catfish (Genus Brachyplatystoma) in the Amazon River basin have a reputation for long distance migrations (up to 5800 km or 3600 miles), so hydropower dam projects present potential barriers to their life history....
Alewives (Alosa pseudoharengus) are small, silvery forage fish in the family Clupeidae (Figure 1). Their native range spans the eastern seaboard of North America from South Carolina to Newfoundland. Historically, alewives have supported important...
Salmon and trout (the salmonids) across the Pacific Northwest are known for their table fare and prodigious sport fishing. In addition, many salmonids are declining because of overfishing and/or lack of adequate spawning habitat,...
Do you ever wonder how scientists get information about the habitat preferences, spawning periods, and migration of fish? There are two methods by which we can observed fish: direct and indirect. An example of...
Microplastics are tiny pieces of plastic that result from the breakdown of consumer and industrial products (Figure 1) such as Styrofoam coffee cups, plastic grocery bags, exfoliants and clothing. These particles accumulate in waterbodies...
Harmful algal blooms (HABs) are overabundant colonies of algae (simple aquatic plants) that have negative impacts on fisheries and humans. Algae thrive in warm, stagnant conditions with high nutrient availability (particularly phosphorus), so HABs...
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...
The Delta Smelt (Hypomesus transpacificus) is a small, silvery creature. It smells like peeled cucumbers and has a lifespan of about a year. This unassuming fish has been at the center of California’s water...
Marine debris is a major issue in coastal and marine ecosystems around the world. While large accumulations of floating debris, such as the Great Pacific Garbage Patch, are the most visible, some other types...
Many species complete annual migrations, usually in search of ideal climates, rich food resources, or prime breeding grounds. When thinking of migration, the hundreds of miles some bird species or monarch butterflies (Danaus plexippus)...
