Those huge fluid filled sacks affect swimming ability most of all, but also eyesight, and are a risk to the fish's health if they get caught, torn or popped and then become infected. Add large bubbles ...
Ralf Britz and Ritva Roesler attempt to rear these living fossils. The Reed fish (or Rope eel) of the genus Erpetoichthys and the bichirs of the genus Polypterus comprise the family Polypteridae — the ...