Description: English: Round goby on a black underground Nederlands: Zwartbekgrondel op een zwarte ondergrond. Date: 3 August 2013. Source: Own work. Author: Peter van der Sluijs.
Description: English: Round goby on a white background Nederlands: Zwartbekgrondel op een witte achtergrond. Date: 19 July 2013. Source: Own work. Author: Peter van der Sluijs.
Description: English: The round goby is an exotic species in the Waal. It was pretty numerous we caught three specimen from different places. It is about 9 cm long. Date: 4 August 2010. Source: Own work. Author: Viridiflavus. Camera location51° 52′ 31.92″ N, 5° 55′ 24.32″ EView all coordinates using: OpenStreetMap 51.875533; 5.923422.
Description: English: Neogobius melanoslomus Nederlands: Zwartbekgrondel dit is een mannetje deze altijd zwart in de paaiperiode. Date: 9 August 2010. Source: Own work. Author: Peter van der Sluijs.
Description: English: Round goby caught in a river Holland Nederlands: Zwartbekgrondel gevangen in een rivier Nederland. Date: 19 June 2017. Source: Own work. Author: Peter van der Sluijs.
Description: English: Round goby invasive fish in the whole world Nederlands: Zwartbekgrondel het meest invasive visje in de wereld. Date: 7 August 2016. Source: Own work. Author: Peter van der Sluijs.
Description: English: Blackmouth gudgeon on a stone surface Nederlands: Zwartbekgrondel op een stenen ondergrond. Date: 5 July 2012. Source: Own work. Author: Peter van der Sluijs.
Description: English: Round goby large caught in Holland Nederlands: Grote zwartbekgrondel gevangen in Nederland. Date: 5 October 2014. Source: Own work. Author: Peter van der Sluijs.
Description: English: Taken in Leamington, Ontario during a research expedition. Date: 26 June 2007 (according to Exif data). Source: Own work. Author: Yavno at English Wikipedia.
Description: English: Two caught round gobies Holland Nederlands: Bekijks bij twee gevangen zwartbekgrondels Holland. Date: 10 August 2015. Source: Own work. Author: Peter van der Sluijs. Camera location51° 54′ 42.53″ N, 4° 14′ 34.17″ EView all coordinates using: OpenStreetMap 51.911813; 4.242826.