Brain staining of pregnant fish. On the left is the Nissl staining use to determine neuron morphology and on the right is ki67 staining which stains for cell proliferation. New research reveals that ...

Guppies can be fooled by optical illusions into believing objects are smaller or larger than they really are. This suggests they might not always make the best choices in their natural environment.

New research reveals that pregnancy-related brain impairment is present in live-bearing fish, but instead of affecting learning and memory as expected from similar research on mammals, it appears to ...

A long-term fish experiment reveals how a mechanism called density dependence, in which the population growth rate slows as the number of individuals rises, affects population dynamics on time scales ...

Evolutionary biologists have long been intrigued by how natural selection -- the process in nature by which the organisms best suited to their environment are the ones most likely to survive and leave ...