Nothing special, in terms of printing or ink.
It's a design based off the old concept of fathers receiving surprises when their significant others have children with certain genetic traits that go against all reason. Unless, of course, their spouse has been... unfaithful, to say the least.

that is one burly he-giraffe

Is that baby-giraffe or great-grandpa-giraffe?

i like the idea but the way its shown makes it look like a family portraite

i love it