because everyone knows a Sharpedo's diet consists of kelp and the occasional gin and tonic.
jokes aside, if some pokeymans are based off animals, it wouldn't be unusual to assume that they share similar characteristics, especially if their biology indicates a specific function in food consumption.
ANYWAY, glad to see development progressing so quickly! since we're so close to 90%, I'm excited to see what the new field effect will be. maybe one more catered for Adrienne's gym battle?