Understanding the dispersal dynamics of an invasive species is important for predicting ecosystem impacts and potential rate of spread. Individuals at the invasion front often have specific behaviors, morphologies, and diets. However, how these three factors change in concert has received little attention. To address this question, we examined the behavior, morphology, and diet of invasive rusty crayfish (Faxonius rusticus, Girard 1852) in northeastern Oregon, USA. Sites included the point of introduction, the invasion front, and one site located mid-way between the other two. We sampled adult males at the three locations, conducted laboratory behavioral assays, characterized diets using DNA metabarcoding, and measured relative claw size. We predicted that crayfish at the invasion front would show a suite of correlated behaviors identified as being part of a bold behavioral syndrome (e.g., high aggression and exploration). In addition, we predicted that diets of individuals at the invasion front would include more preferred prey and a greater diversity of prey items. We found that two behaviors predicted to be positively correlated, exploration and aggression, were negatively correlated. Relative claw size was negatively related to exploration and positively related to aggression and potentially de-coupled the predicted positive correlation between the two behaviors. The negative correlation with exploration likely stems from the energetic costs of moving with large claws. Rusty crayfish at the invasion front had small claws, low levels of aggression, but high exploration rates. We did not find a correlation between diet composition and behavior or morphology at the individual level. However, at the location level diets of crayfish at the invasion front were characterized by animal taxa, while diets at the established location were characterized by plant taxa. Our results highlight the importance of the interplay between behavior and morphology and how morphology can drive unexpected patterns in behavioral syndromes.