No detailed citation.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Anguilla anguilla | Spawning conditions | Spawning migration period | The mature silver eel leaves the rivers of Europe and North Africa in the autumn and swims accross the North Atlantic Ocean (navigating by an unknown process) to spawn in the Sargasso sea in the first half of the following year. Although the spawning process has never been observed, the small eel larvae (leptocephali) appear in the Sargasso Sea between February and July and drift on the ocean currents | ['February', 'March', 'April', 'May', 'June', 'July', 'October', 'November', 'December'] |