1. young eels, especially those migrating from the ocean to freshwater rivers

Examples

• The elvers swam upstream in massive schools during their spring migration.
• Commercial fishermen harvest elvers to supply eel farms in Asia.
• Scientists study elvers to understand eel reproduction patterns.
• The river was thick with elvers making their way to freshwater habitats.
• Elvers are considered a delicacy in some European countries.
• Conservation efforts focus on protecting elvers during their vulnerable migration period.