Purely external similarity, but mayor yet súbele differenced:
has adipose fin (Characin headstander) vs not.
Head down posture most of the time.
No tiny barbels at mouth (present in algae eaters),
different position and structure of mouth.
And on, and on. And yet, at first, quite similar looking.
has adipose fin (Characin headstander) vs not.
Head down posture most of the time.
No tiny barbels at mouth (present in algae eaters),
different position and structure of mouth.
And on, and on. And yet, at first, quite similar looking.
