Figure 6From: Contribution to the study of acoustic communication in two Belgian river bullheads (Cottus rhenanus and C. perifretum) with further insight into the sound-producing mechanismDepiction of spinelike scales covering the body in Cottus rhenanus and C. perifretum . Comparison of the degree to which spinelike scales (prickling) covers the body in both Cottus species. Note the striking differences in the shape of prickles between both species.Back to article page