Du får forska i ämnet prickar på stjätfenan kanske? :D
Yes citerar lite från en artikel jag hittade om just detta nedan ;)
Caudal Eyespots as Deterrents against Fin Predation in the
N eoptropical Cichlid Astronotus ocellatus
KIRK O. WINEMILLER
Astronotus ocellatus and several other large cichlid fishes of South America
exhibit bright ocelli, or eyespots, near the base of the caudal fin. Astronotus
ocellatus sympatric with fin-nipping piranhas of the genus Serrasalmus shows
less extensive fin damage that sympatric cichlids of similar size that lack distinct
caudal ocelli. Ecological data and observed interspecific behavioral differences
support the hypothesis that eyespots reduce piranha attacks by confounding
visual recognition of the prey's caudal region. Dense scalation of the unpaired
medial fins, especially the caudal fin, masks visual cues for fin recognition,
further enhancing head mimicry by the caudal region. The hypothesis that caudal
ocelli in A. ocellatus, and perhaps other large cichlid fishes, function primarily
as eye mimics for defense against fin predators is more parsimonious than Zaret's
earlier "inhibition of cannibalism" hypothesis.
