| He also observed that the farther out to sea in the Atlantic Ocean he went, the smaller the leptocephali he caught were. |
| He noted that all the leptocephali he found were very similar, and hypothesized that they all must have descended from a common ancestor species. |
| Growth of American and European eel leptocephali as revealed by otolith microstructure. |
| These leptocephali metamorphosed into juveniles which were abundant in July and October of the same year. |
| Spawning of Conger oceanicus and Conger triporiceps in the Sargasso Sea and subsequent distribution of leptocephali. |
| They planned to find this patch of ocean by catching newly hatched eel larvae, called leptocephali. |
