Large quantities of eels are caught in the Frisian lakes.
The most valuable catches of food fish in 1904 were those of bluefish ($556,527), squeteague ($212,623), flounders ($67,159), eels ($53,832), cod ($52,710), scup ($48,068) and shad ($36,826).
In the same spirit he investigated the generation of eels, which were at that time supposed, not only by the ignorant vulgar, but by "respectable and learned men," to be produced from dew without the ordinary process of generation.
Owing to the long line of coast and the numerous lakes, fishing forms an important industry, and large quantities of herrings, eels and lampreys are sent from Pomerania to other parts of Germany.
Freshwater scale-fish are mostly full of bones, but fine eels and barbel are plentiful in the rivers.