| Second, in most basal ray-finned fishes such as sturgeon and trout a single dorsal fin is present and is supported by flexible fin rays. |
| The sturgeon tail behaves mechanically as an extremely flexible sheet with flexible dorsal and ventral lobes following the central tail region. |
| These barbels hang below the mouth and feel the bottom as the sturgeon swims. |
| The taste buds of the lake sturgeon protrude from the toothless mouth and are used to help in the selection of food. |
| Some sturgeon survive in the rivers of the Northeast, where they have recolonized the Hudson. |
| All four barbels are evenly spaced under the jaw, unlike the related pallid sturgeon, which has barbels unevenly spaced under the jaw. |
