L'avrinčíková, M. and Kováč, V., 2007. Invasive round goby Neogobius melanostomus from the Danube mature at small size. Journal of Applied Ichthyology, 23(3), pp.276-278.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Neogobius melanostomus | Egg | Egg size after water-hardening | 2.35 mm | 2.35 mm |