Ultimate Oddball Fish Keeper's Action Checklist

Why You Need This Checklist

Have you ever stood in front of a pet store tank and seen a fish so strange, so otherworldly, that you had to stop and ask yourself — is that thing even real? That moment of pure wonder is exactly what oddball fish keeping is all about. But here is the problem most aquarists run into: you fall in love with one of these incredible creatures, bring it home, and weeks or months later something goes wrong. The tank is too small. The water conditions are off. The tankmates were a disaster. And that magnificent, expensive, once-in-a-lifetime fish is gone.

It happens more than anyone likes to admit, and it is almost always because nobody handed you a clear, specific roadmap before you made the leap.

Now picture this instead. You walk into that same store, see that jaw-dropping clown knife, black ghost knife, or red pike cichlid, and you already know exactly what tank size it needs, what it will eat, what tankmates to avoid, how long it might live, and what warning signs to watch for. You bring it home confident, and years later that fish is still thriving — a living centerpiece that makes every visitor stop and stare.

That is the experience this checklist was built to give you.

The hosts of The Tank Talk Podcast have decades of combined hands-on experience breeding, importing, and keeping some of the most unusual fish in the freshwater hobby. In this episode, they cover ten specific oddball species — ranging from fish you can keep in a 10-gallon all the way up to species that require hundreds of gallons — and they share the real-world details that most care sheets leave out: minimum tank dimensions, compatibility pitfalls, feeding challenges, lifespan commitments, and the hard lessons learned from personal experience.

This checklist distills every actionable insight from that conversation into a clean, step-by-step reference you can use right now. Each step tells you exactly what to do, what to buy, what to avoid, and what to research before you spend a single dollar on a fish that deserves to be kept right.

Whether you are drawn to the prehistoric dinosaur energy of a bichir, the ghostly elegance of a black ghost knife, or the sheer spectacle of a silver arowana, this checklist walks you through the decision-making process from start to finish.

Print it out. Keep it in your fish room. Bring it to the store. Use it every time you feel that pull toward something weird, wonderful, and completely unforgettable.

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Every checklist item comes with actionable notes to guide you — things like "Don't forget to do this before you start," "Avoid this common mistake," or "Set a reminder for 30 days out." Nothing vague, just clear next steps.

DECIDE Define what qualifies as an oddball fish before you shop, so you make intentional purchases

RESEARCH Research gobies and gudgeons as a species group covering tank sizes from 10 gallons to 6-foot setups

DO Provide high water flow for any goby or gudgeon species you plan to keep

AVOID Match goby or gudgeon tankmates carefully based on the specific species size

AVOID Handle hyphen gobies with extreme caution — use a net or cup, never your bare hands

+ 30 more action items inside...

Ultimate Oddball Fish Keeper's Action Checklist

Why You Need This Checklist

What's Inside — Preview

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