Capybara in Minecraft

Putting capybaras in Minecraft would be a good creature, just like wolves and cats that are domesticated, they are peaceful, they are very sleepy and are found near rivers.  How when a wolf attacks a sheep and the wolf is angry and the capybara is domesticated with sugar cane or watermelon its function is that you could put a saddle on it and cross oceans And be underwater without drowning but be very fast, also swim fast against the current and give a call if there is a hostile mob nearby or an armed player who hides in the light at night For fear of hostile mobs he will lie down anywhere and be like a pig on the ground and swim in the water