Tell us about the sea slugs & nudibranchs in your country! There are currently 36,163 photos posted with 1,909 registered species. Search for nudibranchs by color more Newly arrived nudibranchs more Sacoproteus nishae Krug, Wong, M. R. Medina, Gosliner & Á. Valdés, 2018 Trapania sp.19 Aglajidae sp. 9 Aglajidae sp. 8 Tambja spp. Discodorid sp.17 Martadoris sp. 2 Avaldesia albomacula (J. M. Chan & Gosliner, 2007) Newly submitted photos more Trinchesia sp.20 Thecacera sp.10 Trapania sp.13 Mariaglaja mandroroa (Gosliner, 2011) Petalifera sp. 1 Trapania japonica (Baba, 1935) Trinchesia sp.46 Aeolidioidea sp. 4