There are several ways to tell if someone is a loan shark. Some obvious signs include loan interests rates that are out of the ordinary for that person's area of expertise, being overly quick to take loans regardless of creditworthiness, and always being poised to collect on loans even if they cannot actually afford them. Additionally, some loan sharks will often dress in flashy or ostentatious clothing in order to stand out from other people and make it more difficult for potential victims to escape their clutches.