What numbers do fish, turtle, shrimp and crab represent respectively, and explain them. Some may represent multiple numbers, please elaborate.

According to the number homophonic or shape: fish -30, lying 30. The fish tail is like a 3, and its eyes are 0. Turtle -8, turtle is homophonic with the number 8, shrimp -63, looks like the number 6 from the front, looks like lying 3 from the back, and crab -4 has four legs on its left and right, which is homophonic with the number 4. In the constellation 12, the fourth place is cancer.