 Another finding was that if these cannibalistic Tiger Salamanders lived in areas with a fathead minnow population, the salamanders began to feed on them.These two organisms have similar diets, and with the wider head of these salamanders, they were able to accommodate for the larger size of the minnow, reducing competition for resources between the two species.It has been discovered that cannibalistic Tiger Salamanders tend to go through metamorphosis earlier than the typical morphology.