I don’t know why Nevada needs a Tartan. 
And further, why it would have red in it.
Tennessee soils itself, every time it hears the word “Evolution”.
Does that help? {DEWY-EYED INNOCENCE}
Our oyster is the official state oyster. We don’t have an official mollusc. We should introduce a bill. However, since it’s the mascot for Evergreen State College, the other institutions of higher Ed in Washington might object.
Rhode Island State Shell is the Quahog. No surprise there. Our State Drink is Coffee Milk. I don’t even know if it’s available elsewhere. The State Rock is Cumberlandite whose only source is behind an old cemetery in our town. I don’t know how many states have an official appetizer but ours is Calamari, specifically battered fried squid rings usually served with hot peppers. The State Insect is the American Burying Beetle for some reason but if you asked Row Dilanders what the state bug is they’d mostly say it’s the Big Blue Bug.
I’d say having a State Appetizer leads for weirdest so far.
Here is a list of Kentucky State Symbols, Songs, and Emblems.
A few of the ones that are not obvious (like Coal, Thoroughbreds, and Bluegrass Music would be):
Agricultural Insect: Honeybee
Drink: Milk (Not Bourbon?)
Fossil: Brachiopod
Gemstone: Fresh Water Pearl
Musical Instrument: Appalachian Dulcimer
Soft Drink: Ale-8-One
Silverware Pattern: Old Kentucky Bluegrass
Sports Car: Corvette
But that was before this reared its funky little head:
New Mexico has
A state song
A state ballad
A state cowboy song
A state Spanish song
A state bilingual song
For the ladies, our state necklace is the squash blossom.
For the gents, our state necktie is the bolo.
We have two state vegetables, chile and pinto beans (the legislature deemed them to be inseparable). Related to the chile, our state question is “red or green?”
Our state fossil is the coelophysis.
We have both a state butterfly (the Sandia hairstreak butterfly) and a state insect (the tarantula hawk wasp).
I’m not sure why we need a state tartan, but the sett does a fair job of incorporating the state flag into the design.
It’s a Southern thing.
Hawaii has a state fish, which probably isn’t that unusual. The name is pretty cool, though:
Humuhumunukunukuapua’a
I think they throw in the apostrophe to make it hard to pronounce.
Being British, I had no place being flippant about anybody else’s grub. They’re probably delicious.
Are they delicious?
I’ve never lived in Dixie, so I don’t actually know. Most southern dishes taste better than the name would lead you to expect.
According to the wiki, they are boiled in water with either salt or spices. So they probably taste like a little bit of nut and a lot of seasoning.
Maryland has some pretty strange ones:
State cat: Calico
State Dessert: Smith Island cake
State Exercise: Walking
State Dance: Square dance
State Theater: Center State
I think that it’s really neat that Maryland’s official state sport is Jousting.
I tries some once and thought they were way too salty.
I guess the State Thingy, so far, that I least would have expected, is that so many states have an official State Tartan.
Arizona has an official neckware.
I was surprised to find that South Carolina’s state dog was the Plott Hound rather than the Yellow Dog.
The Indiana state beverage - water.
Michigan is the state I lived in longest as an adult and that was the one I was going to post for them. Kalkaska sand isn’t just legally named as the state soil. It’s a real thing unique to the state.
Hang On Sloopy has already been mentioned, which is the weirdest I know of for Ohio.
Utah has a state bird, which isn’t unusual (I think all 50 have one of those). And there’s a very good historical reason for why their choice makes a lot of sense. But it’s still odd for a state’s Official Bird to be named after a different, not-even-bordering, state (the California Gull).