Amazonian pink dolphins figure in local imaginations as (enchanted) beings that can take on the appearance of persons and have sexual relations with humans. In the context of fishing, ribeirinhos establish connections with dolphins that can be driven by intense corporeal intimacy, as well as by mutual hostility. These ambivalent connections result in contrasted personal characterizations of dolphins, which are 'tame' or 'partners' (mansos, amigados) for some, but 'wild beasts' (bichos bravos) to others. In recasting the 'wild' and the 'tame' as affective positions, the case of the dolphins instantiates a local form of relating to animals that fragments the biological 'wild' into highly personal and ambivalent relational events. This article takes the affective positionality of the 'wild' as an angle to reinterpret, at a corporeal scale, the potential for companionship and hostility in interspecies relations.