Which Aquarium Fish Have the Highest Demand-to-Supply Ratio?
On FishyHub's US marketplace, the fish with the highest measured demand-to-supply ratio is the giant halfmoon plakat betta, where demand clearly outpaces a limited supply. Halfmoon plakats also have demand ahead of supply, while standard halfmoons are balanced. These are the only US categories with enough buyer activity to measure the ratio so far; for the rest of the market, FishyHub's supply and price tiers show where buyers have the most choice and where listings are thin.
Key Findings
- FishyHub data shows giant halfmoon plakat bettas have the highest demand-to-supply tier on the US marketplace, with demand clearly outpacing limited supply.
- FishyHub US data shows halfmoon plakat bettas draw very high buyer interest and have demand ahead of supply, despite high supply.
- FishyHub data shows halfmoon bettas in the US are balanced, with high buyer interest and high supply.
- FishyHub data shows halfmoon plakats sit in the mid-range price tier in the US, below halfmoons and giant halfmoon plakats in the upper mid-range.
- FishyHub US data shows bettas overall have high supply and a wide price spread between varieties, with rising momentum.
- FishyHub data shows several collector-tier marine groups, including dwarf angelfish, eels, large marine angelfish, LPS corals and tangs, have high or very high US supply, giving buyers a deep pool of listings.
- FishyHub data shows the US demand-to-supply picture is still forming: the marketplace is new, and the ratio can be measured only where buyer interest is strong.
What the Demand-to-Supply Ratio Measures
FishyHub compares demand for a category with its supply of active listings, then places it in a tier:
- Demand clearly outpaces supply - buyers want far more than is listed.
- Demand ahead of supply - demand is greater, but less sharply.
- Balanced - listings and demand broadly match.
- Supply ahead of demand - listings outnumber interested buyers.
In the US, demand is measured from buyer interest: wishlists, likes and "my tank" saves from FishyHub users in the US on US-listed products. The US marketplace does not yet have order history in this data. That makes the ratio a measure of how much attention a fish gets compared with how much of it is for sale.
The Three Bettas With a Measured Ratio
| Betta | Supply | Buyer interest | Demand-to-supply tier | Price tier | Price spread |
|---|---|---|---|---|---|
| Giant halfmoon plakat | Limited | Moderate | Demand clearly outpaces supply | Upper mid-range | Narrow |
| Halfmoon | High | High | Balanced | Upper mid-range | Moderate |
| Halfmoon plakat | High | Very high | Demand ahead of supply | Mid-range | Narrow |
Giant halfmoon plakat: a scarcity story
Giants do not draw the most interest of the three, but their supply is so limited that even moderate interest outruns it. These are large-bodied plakats from specialist lines, mainly bred in Southeast Asia. They take longer to raise to a saleable size, and fewer are imported at a time. The narrow price spread suggests sellers broadly agree on what a giant is worth, and buyers are paying it.
Halfmoon plakat: a popularity story
Halfmoon plakats are the opposite case. Supply is high, yet buyer interest is very high and pulls demand ahead. Their mid-range price makes them an easy step up from pet-store bettas, and their short fins suit beginners: they tear less, resist fin rot better and swim more actively than long-finned forms.
Halfmoon: in balance
Standard halfmoons have high interest and high supply. Long-finned show bettas remain a staple, and enough sellers list them that buyers have choice.
Why Bettas Are Where the Ratio Shows First
Bettas are the most natural fit for a new online marketplace in the US. A single betta ships well in a small bag and box, is bought as an individual fish rather than a group, and is easy to photograph, so buyers can choose a specific fish from a listing. Those traits generate wishlists and likes quickly, which is why bettas are the first US categories with enough interest to measure.
Reading the Rest of the US Market
Without a measured ratio elsewhere, supply and price tiers show the shape of the market.
Deep supply, even at collector prices
Several US categories combine a collector / premium price tier with high or very high supply: dwarf angelfish, eels, large marine angelfish, LPS corals and tangs in marine, and flowerhorn in freshwater. A deep pool of listings at the top of the price range suggests strong seller confidence and gives buyers room to compare.
Plentiful budget fish
Barbs, catfish, guppies, shrimp and tetras all have very high US supply in the entry-level / budget tier. These are the fish where American buyers have the widest choice online.
Thin supply
Limited US supply shows up in arowana, rays, sharks, scorpionfish, hatchetfish, oscars and silver dollars, among others. Where supply is this thin, even modest demand could push a category into the higher ratio tiers as the marketplace grows.
What This Means for US Buyers
- Giant halfmoon plakats: expect competition. Wishlist a fish you like and act when it is listed.
- Halfmoon plakats: supply is high, so there is choice, but the best colors draw attention quickly.
- Halfmoons: a balanced market, good for comparing sellers.
- Shipping: bettas travel well, but sellers may pause shipping in extreme heat and cold. Delivery to the Alaska, Hawaii & territories zone generally takes longer and costs more than to the Midwest & Central, East Coast & Northeast, South & Southeast or West Coast & Mountain West zones.
Methodology
This page uses FishyHub's US marketplace activity over the period from October 2024 to October 2026: active listings, listed price tiers and price spread, new listings over time, and buyer interest (wishlists, likes and "my tank" saves) from US users on US listings. Demand-to-supply tiers are FishyHub's comparison of that interest with listings. All findings are reported as tiers and directions, not figures or ratios.
The US marketplace is new and has no order history in this data, so the ratio covers only halfmoon, halfmoon plakat and giant halfmoon plakat bettas. FishyHub does not report state-by-state figures. Shipping notes are general hobby knowledge, not FishyHub data.
Frequently Asked Questions
Which aquarium fish have the highest demand compared with supply in the US?
On FishyHub's US marketplace, giant halfmoon plakat bettas, where demand clearly outpaces limited supply. Halfmoon plakats also show demand ahead of supply.
Why are halfmoon plakat bettas in such demand?
They are hardy, active, come in striking colors and sit in the mid-range price tier, which draws very high buyer interest on FishyHub.
Is there enough supply of betta fish in the US?
For standard halfmoons, yes: demand and supply are balanced. Giant halfmoon plakats are the clear exception.
Why doesn't FishyHub report a demand-to-supply ratio for every US fish?
The US marketplace is new, and only bettas have enough buyer activity to measure it reliably so far.
How to Cite This Page
Source: FishyHub, "Which Aquarium Fish Have the Highest Demand-to-Supply Ratio?" (2026), https://fishyhub.com/us/blogs/blog-detail/which-aquarium-fish-have-the-highest-demand-to-supply-ratio
