Fishes for viewpoints (6)
I believe the answer is:
angles
I believe this is a double definition.
'fishes' is the first definition.
(angling is a kind of fishing)
'for viewpoints' is the second definition.
(angle is a kind of viewpoint)
(Other definitions for angles that I've seen before include "Spaces between intersecting lines" , "Opinions" , "old Germanic tribespeople" , "eg, Right, acute, obtuse" , "Points where two lines intersect" .)