The number 21 can symbolize a lot of things, it has a lot of different backgrounds but to me the most interesting and important thing about 21 (which is why I've gotten a tattoo of it) is 21 grams is the weight of the soul.
I also love that if you double 21 you get the answer to the universe (Hitchhiker's Guide to the Galaxy).
The number 19.
There are an unlimited number of things that a butterfly tattoo on the left shoulder could symbolize. It could symbolize peace for example.
Nuestra Familia.
The ox tattoo may symbolize quite a number of things. The common significances of the ox tattoo include determination, endurance, service, wisdom, common sense and so much more.
If a guy has it, it then means he has a tiny smeckle - true story!
A dagger tattoo symbolizes death.
A black swan tattoo can symbolize man different things. It could symbolize that the owner of it is peaceful and graceful. Swans are mainly known to symbolize grace.
Purple is a color of royalty. Dragonflies symbolize good luck. A purple dragonfly tattoo is therefore a very good tattoo to have.
A butterfly koi tattoo can symbolize a great many things. A butterfly koi can symbolize faith, trust, hope, and love.
A Scales tattoo could symbolize justice, or the person with the ink could believe in astrology and be a Libra.
A fish bone tattoo symbolizes high status. The fish bone tattoo was popular among Native American tribes to symbolize their ranking.
Moon tattoos often symbolize motion and change. A tattoo of the earth can symbolize many things, however, it best symbolizes life.