Gobius gasteveni Miller, 1974

Iglésias, Samuel P., Bariche, Michel, Beau, Florent, Bérenger, Lucas, Beucher, Renaud, Chabrolle, Antoine, Cottalorda, Jean-Michel, Cousin, Bertrand, Curd, Amelia, Danet, Valentin, Duhamel, Erwan, Duval, Audrey, Farque, Pierre-André, Goascoz, Nicolas, Jadaud, Angélique, Larnaud, Pascal, Bouter, Mathieu Le, Bras, Yvan Le, Bris, Sylvain Le, Lombard, Laurent, Louisy, Patrick, Mandine, Alain, Mas, Lise, Menut, Thomas, Metral, Luisa, Poussard, Pierre, Quéro, Jean-Claude, Raybaud, Virginie, Renoult, Julien P., Richard, Thomas, Spitz, Jérôme, Ternon, Quentin, Thiriet, Pierre & Tournier-Broer, Ruben, 2021, French ichthyological records for 2019, Cybium 45 (3), pp. 169-188 : 181

Gobius gasteveni Miller, 1974

Seven Steven’s gobies, Gobiidae ( Fig. 8D ), were observed and collected by S.P. Iglésias while scuba diving on 30 Aug 2019 during an excursion targeting fishes inhabiting maerl beds, about 2 km off the Kelenn beach at Caran- tec, Bay of Morlaix (48.688°N, 3.903°W, Finistère), at 3.5- 5.1 m depth at low tide. Seawater bottom temperature was 17°C. The immature individuals were about 25-30 mm TL. A specimen 27 mm TL, 23 mm SL, was preserved with the collection No. MNHN-IC 2021-0150 and a tissue sample was preserved under No. BPS-4288. Adult Steven’s gobies have occasionally been recorded in the English Channel and the southern North Sea in 2017 ( Iglésias et al., 2019), but the ecology and life history of the species are still poorly known. Maerl seabeds in open bays could be a favoured gathering area for the species. Rare to occasional coastal observations of the species were also recorded in 2008-2010 in Plymouth, Bigbury Bay and Lyme Bay ( England) ( Baldock and Kay, 2012).

Figures

Figure 8. – Significant French ichthyological records for 2019 (continued). A: Gobius couchi, ~7 cm TL, 15 June 2019 (© S. Le Bris); B: G. couchi, ~8 cm TL, 19 Aug 2019 (© L. Bérenger); C: G. couchi, 26 mm TL, 15 Sep 2019, MNHN-IC 2021-0149 (© S.P. Iglésias); D: Gobius gasteveni, 27 mm TL, 30 Aug 2019 MNHN-IC 2021-0150, in aquarium, reversed image (© S.P. Iglésias); E, F: Lebetus guilleti, 19.5 and 19 mm TL, male and female, 15 Sep 2019, MNHN-IC 2021-0154, and 2021-0155, respectively (© S.P. Iglésias); G: L. guilleti, 21 and 18 mm TL, two males and a female, 30 Aug 2019, MNHN-IC 2021-0151, 2021-0153 and 2021-0152 from left to right respectively, in aquarium (© S.P. Iglésias).