Rails parameter naming discrepancy

rake routes

Kombucha:delme$ rake routes
 snack_eat GET    /snacks/:snack_id/eat(.:format) snacks#eat
    snacks GET    /snacks(.:format)               snacks#index
           POST   /snacks(.:format)               snacks#create
 new_snack GET    /snacks/new(.:format)           snacks#new
edit_snack GET    /snacks/:id/edit(.:format)      snacks#edit
     snack GET    /snacks/:id(.:format)           snacks#show
           PUT    /snacks/:id(.:format)           snacks#update
           DELETE /snacks/:id(.:format)           snacks#destroy

routes.rb

Delme::Application.routes.draw do
  resources :snacks do
    get 'eat'
  end
end