Definition
Tetragonurus refers to a genus of fish, specifically the squaretails. These fish are known for their unique body shape, which is somewhat square or rectangular in cross-section, hence the name. They are pelagic fish, meaning they live in the open ocean, not near the bottom or shore. Think of them as ocean wanderers, often found near drifting objects. Unlike reef dwellers, they're built for long-distance swimming in deep waters. They mainly feed on jellyfish and other gelatinous zooplankton. Their lifestyle makes them fascinating but rarely seen creatures.