triggerfish: any of numerous compressed deep-bodied tropical fishes with sandpapery skin and erectile spines in the first dorsal fin
plectognath: tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines
dilatory plea: a plea that delays the action without settling the cause of action; it can challenge the jurisdiction or claim disability of the defendant etc. (such defenses are usually raised in the defendant's answer)