Taking orders from a geoduck will place you into enemy territory. Geoducks make terrible commanders, so if you take orders from one, expect to end up in unknown territory, potentially even enemy territory. Be prepared.
Not wanting to end up dead in enemy territory, you decide to escape this geoduck leader by getting on a row (りょう) boat and rowing your way outta there. The geoduck commander orders you to halt your escape, but you still get in your row boat and row away.
Currently there are no similar looking kanji which exist in the WaniKani learning system