Assertion: butterfly fish's fin | /r/HasProperty | short
Facets:
value: on the back
type: LOCATION
Source sentences:
text: The dorsal fin is short and very backward on the back, but the pectoral fins are very large, similar to wings, which generally hold well open and which have the function of pushing upwards outside the surface of the water to fly on the fly insects on their head, also contribute to camouflaging the fish, making it look like a dead leaf floating on the surface.