First of all the Lebensspuren and eel pout in this photo, immediately stand out. The lebensspuren –
Also The eel pout one-whiskered fish ,its single “barbell” is often referred to as a goatee
Therefore shown is The high density of lebensspuren indicate a low current environment.
The term “eel” is also used for some other eel-shaped fish, such as electric eels, spiny eels, and deep-sea spiny eels (family Notacanthidae).
These other clades, however, evolved.
Eels measure no bigger than a pinkie and look more like vitreous earthworms than fish eel-like shapes independently from any other.