a fish fancier的用法和样例：
- When I offered my assistance, he mentioned that his new wife was a fish fancier.
- She was trying hard to disgorge a fish bone.
- I've got a fish bone stuck in my throat.
- A fish in water is in its natural medium.
- A whale is no more a fish than a horse is.
- Big deal! I caught a fish twice that big last week.