Perhaps like an eel the "Mutchs" spend their adolescence in fresh water, from creeks to swamps, lakes and man made dams. At some point in their life (up to 20 years on) they feel a calling and will move into tidal rivers or creeks (often slithering over grassland to get there). They will migrate down the waterway into the ocean, eventually making their way out to the continental shelf and following this until they reach the coral sea where they will give birth to hundreds of "elver". The young and the old will then migrate back to the same rivers and creeks they migrated from, and so forms the incredible journey of the eel.
perhaps he has a pretty big dick.