The purpose of this experiment was to study fighting behavior in male Betta splendens. The study looked at how the aggression level of male Bettas would change in the presence of a female. Five pairs of male bettas were tested ten times: five times with a female present and five times with a female absent. During each test, the males were exposed to each other for three minutes and the number of flares were counted. A one-tailed paired t-test showed that aggression levels of each male betta increased in the presence of a female.


Ron Coleman

Lab site

California State University, Sacramento (Sac State)

Funding Acknowledgement

The 2018 STEM Teacher and Researcher Program and this project have been made possible through support from Chevron (www.chevron.com), the National Marine Sanctuary Foundation (www.marinesanctuary.org), the National Science Foundation through the Robert Noyce Program under Grant #1836335 and 1340110, the California State University Office of the Chancellor, and California Polytechnic State University in partnership with California State University, Sacramento. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the funders.



URL: https://digitalcommons.calpoly.edu/star/498