Frequency of feeding attempts on Corbicula clams by pairs of black carp Mylopharyngodon piceus, enumerated by size class from GoPro Hero 4^R camera recordings of fish activity within each tank during the first three hours in which prey were provided. No video was recorded in tank five, and no feeding was observed in tank two. Prey size classes consisted of small (mean shell length 16.27 mm), medium (22.37 mm), medium-large (26.46 mm), and large (32.38 mm).