Difference between Questionable and Fishy

QUESTIONABLE vs FISHY: NOUN

Able to be refuted
Open to doubt or challenge; problematic.
Not yet determined or specified.
Of dubious morality or respectability.
Admitting of being questioned; inviting, or seeming to invite, inquiry.
Liable to question; subject to be doubted or called in question; problematical; doubtful; suspicious.
Problematic; open to doubt or challenge
Of dubious respectability or morality
Subject to question

Not as expected
Resembling or suggestive of fish, as in taste or odor.
Inspiring doubt or suspicion.
Consisting of fish; fishlike; having the qualities or taste of fish; abounding in fish.
Extravagant, like some stories about catching fish; improbable; also, rank or foul.
Of, from, or similar to fish.
Suspicious; inspiring doubt.
Of or relating to or resembling fish
Cold or expressionless.

Capable of being questioned or inquired of; inviting or seeming to invite inquiry or conversation.
Liable to question; suspicious; doubtful; uncertain; disputable: as, the deed is of questionable authority; his veracity is questionable.

Plucky; brave; sturdy and enduring; thorough and faithful in duty: as, fishy to the backbone; a fishy man.
Equivocal, unsafe, or unsound, as a speculation or a course of conduct: as, a fishy venture.
Dull and expressionless, like the eye of a fish.
Extravagant, as a story; dubious or incredible, like many stories told about fishing and fishes. Compare fish-story.
Like fish; having a fish-like quality: as, a fishy taste or smell.
Abounding in fish; inhabited by fish: as, the fishy flood.

Supposed, Apocryphal, Deniable, Suspect, Refutable, Alleged, Equivocal, Suspicious, Fishy, Problematical, Shady, Problematic, Debatable, Doubtful, Dubious

Goldfish, Sleazy, Poisson, Fish, Creepy, Dodgy, Dubious, Wrong, Weird, Queer, Suspect, Funny, Questionable, Shady, Suspicious

Supposed, Apocryphal, Deniable, Suspect, Refutable, Alleged, Equivocal, Suspicious, Fishy, Problematical, Shady, Problematic, Debatable, Doubtful, Dubious

Goldfish, Sleazy, Poisson, Fish, Creepy, Dodgy, Dubious, Wrong, Weird, Queer, Suspect, Funny, Questionable, Shady, Suspicious

Histopathology should be considered to discern questionable lesions.
Implement procedures for follow up on questionable cases.
Any questionable purchases are reimbursed by the employees.
The value of determining rectal temperature is questionable.
Report: Steph Curry, Kevin Durant questionable tomorrow vs.
Might some of those restrictions be constitutionally questionable?
The evidence behind this dietary strategy is questionable.
Propose removing this verbiage as it is questionable whether this is relevant given the amount of information available and possibly ethically questionable.
Do report coupons you see that look questionable by sending any valuable information you have about where you saw or received a questionable coupon.
We have software on all our electronics that alerts each other if we go to questionable sites or search questionable content, etc.

And my thinking was that something sounded fishy.
Why do fish have to taste fishy anyway?
He is the best friend of Fishy Boopkins.
Is there something fishy at Reef Club Casino?
This Hope for Paws seems way too fishy.
There are way too many fishy varieties, though.
Right from the start I suspected something fishy.
Fizzy Orange Juice, Fishy Green Ale, and more.
Fishy Fish distributes its products within the US through its US subsidiary, Fishy Corp.
High tides during Hurricane Florence deposited debris on the sidewalk at the Fishy Fishy Cafe in Southport.