Great
じん
はなは
None
Making a mnemonic for a crab trap is VERY hard. So hard that I couldn't come up with one. But it's very possible that one of you will!
You know what else is very something? Jeans (じん). Jeans are very expensive. Jeans are very tight. Jeans are very popular. Jeans are very a lot of things.
Currently there are no similar looking kanji which exist in the WaniKani learning system