We already know that courtship rituals for male cichlids often consist of various physical displays and behavior. Add sounds to that mix. According to recent research conducted at Stanford University, male Astatotilapia burtoni utilize low frequency sounds as part of their mate attraction repertoire.
While the news article provides links to the lead researcher at Stanford and his lab, the article doesn't link to the scholarly publication from which the news article was assembled. This is unfortunate and a problem that often hinders success of science communication.
A shout out to cichlidophile Brandon Sturgeon who posted a link to the Stanford article on the Cichlid Keepers Facebook group page.
The Cichlid Room Companion
Tropical Fish Hobbyist
American Cichlid Assoc.
African Cichlid Hub