While the opportunity to engage in scientific reasoning has been identified as an important aspect of informal science learning (National Research Council, 2009), most studies have examined this strand of science learning within the context of physics‒based science exhibits. Few have examined the presence of such activity in conjunction with live animal exhibits at zoos and aquariums. A video study of 41 families at four touch‒tank exhibits, where visitors can observe and interact with live marine species, revealed that families engaged in making claims, challenging claims, and confirming