barracuda
魣 centers on the barracuda, a predatory fish. The meaning is specific to this creature.
魣 combines 魚 (fish) with 予, which likely contributes the sound. The character was created to name the barracuda.
The left side is a fish 魚, and the right side 予 looks like a spear. Picture a barracuda, a fish as swift and sharp as a spear.
For ショ, imagine a barracuda leaping out of the water with a sharp 'sho' sound, like a spear cutting through the air.