8. The most important genera of the Gobies (Gobiina): Gobius (nearly cosmopolitan), Sicydium, Boleophthalmus, Periophthalmus, Eleotris (equatorial). Many of the species are entirely confined to fresh water.
9. The Amblyopina, similar to the Gobies, but with more elongated body: Tropical Indo-Pacific.
10. The Trypauchenina: Coasts of the Indian region.
11. Many species of Blennius, of which several are found far inland in fresh waters—for instance in North Italy, in the Lake of Galilee, in the eastern parts of Asia Minor.
12. The majority of Atherinidæ, and
13. The Mugilidæ: both families being most numerous and abundant in brackish water, and almost cosmopolitan.
14. Many Pleuronectidæ prefer the mouths of rivers for the same reason as the Rays; some ascend rivers, as the Flounder, Cynoglossus, etc.
15. Several Siluridæ, as especially the genera Plotosus, Cnidoglanis, Arius, which attain their greatest development in brackish water.
16. The Cyprinodontidæ are frequently found in brackish water.
17. Species of Clupea, some of which ascend rivers, and become acclimatized in fresh water, as Clupea finta, which has established itself in the lakes of northern Italy.