ROCKAWAY BEACH, Ore. – Thousands of jellyfish-like creatures were seen piled up on Rockaway Beach Sunday morning in what appeared to be a massive die-off. The animals are called Velella velella.

In an ocean popularity contest, jellyfish would rank near the bottom. They sting. Their increasing population blooms clog power plant intakes, kill farmed salmon and frighten swimmers. Experts warn of ...

Climate change and human activity have impacts that ripple through all ecosystems. Their negative effects can lead to population imbalances across these various ecosystems. While populations of many ...