Hey,I just wanted to kinda add some ideals- I use to draw for a shop when I was younger, I have Tatts that I have drawn-I was thinking if you could sit down with someone you trust and who can draw, see if you can have something custom done, some artists are good at this too, but the question you have with the art is because you relate to it but then again must not. Your tattoo that will symbol so much should be something when you see it you know it with out a second thought. Check out other for ideals and picture for ideals but I think for you to combine your family with something you enjoy( suchas the aquatic hooby) you might really want this to be yours and yours only....
know what I mean.
As far as the two above, if I would pick one it who be the kio-symbol of life=family is your life. but that, depending on place and size, could be a large Tatt if you really dont want something big...go with the first-sharpen the lines and it would be more of a trible peice...
goodluck