the.com/gar

means A long, slender freshwater or coastal fish with a hard beak-like snout and a body armored in tough, diamond-shaped scales.

from From Old English gār, meaning 'spear' — the same root that gave us 'gore' (to pierce). The fish was named for its long, spear-like jaw, a plain and literal bit of naming by people who looked at the thing and called it what it resembled.