I believe you can purchase them from a private stocking company. But make sure to keep the receipt, I do believe you cannot legally keep game fish as a pet, someone correct me if I am wrong.
Unless you’re under 16 years old.
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General Regulations
What about fish for an aquarium?
If you are older than 16, you can transport live fish for display in a home aquarium only
if you purchase the fish from an authorized licensee and have documents such as a
sales receipt to prove it.
Youth age 16 and younger can legally transport certain live fish for display in a home
aquarium if:
•
They have legally caught the fish from among the following species: largemouth,
smallmouth or rock bass; yellow perch; black or white crappie; bluegill,
pumpkinseed, green or orange-spotted sunfish; black, yellow, and brown bullhead
•
No more than four fish of each species are transported at any one time.
•
All fish are 10 inches or less in length.
•
Fish are not transported in water taken from any lake or stream. You must bring
bottled or tap water for transport.