* Fitful: Suggests unpredictable, restless, or intermittent behavior.
* Evil-eyed: Implies a sinister or malicious gaze, possibly associated with aggression or danger.
* Dogfish: A type of shark, known for their sharp teeth and often considered a fearsome predator.
Therefore, it is a figurative expression, conjuring an image of a dogfish with a menacing presence and erratic actions. It is not a scientific term with a specific definition.