Fastest-Growing Aquarium Fish in America
The fastest-growing aquarium fish in America, on FishyHub's US marketplace, are halfmoon plakat and giant halfmoon plakat bettas, where rising listings still fall short of buyer demand. Saltwater reef fish and corals are the other big growth story, with activity rising across every marine fish group FishyHub tracks. Because the US marketplace is new and almost every category is rising, FishyHub separates the real growth stories by looking at where rising activity meets strong demand, deep supply, or a new specialist niche.
Key Findings
- FishyHub data shows activity rising in almost every US aquarium fish category over the period from October 2024 to October 2026, as independent merchants build out a young marketplace.
- FishyHub data shows halfmoon plakat bettas combine rising activity, very high buyer interest and demand ahead of supply in the US.
- FishyHub data shows giant halfmoon plakat bettas are rising in the US with demand clearly outpacing limited supply.
- On FishyHub, every US marine fish group it tracks shows rising activity, from clownfish and tangs to seahorses and dragonets.
- FishyHub data shows LPS, SPS and polyp corals rising in the US from a base of very high supply, alongside soft and mushroom corals.
- FishyHub data shows specialist fish such as black arowana, jardini arowana, datnoids and knifefish are rising in the US from limited supply.
- On FishyHub, the US freshwater groups growing from the deepest supply include barbs, catfish, discus, guppies, plecos and tetras.
Reading Growth in a New Marketplace
Growth is measured on FishyHub by momentum: new listings and orders in the recent year compared with the year before. In the US, that measure points up almost everywhere, because the marketplace itself is growing. A rising label on its own, then, says more about FishyHub than about the fish.
To find the fish that are genuinely gaining ground with American hobbyists, this page combines momentum with three other signals:
- Demand against supply. Where buyer interest runs ahead of listings, the growth is being pulled by shoppers, not just pushed by sellers.
- Depth of supply. Groups rising from an already very high level of listings show where merchants are confident of steady sales.
- New niches. Groups rising from limited supply show specialist fish arriving in the US marketplace.
The Clearest Growth Story: Plakat Bettas
| Betta group | Activity | Buyer interest | Demand vs supply |
|---|---|---|---|
| Giant halfmoon plakat | Rising | Moderate | Demand clearly outpaces supply |
| Halfmoon | Rising | High | Balanced |
| Halfmoon plakat | Rising | Very high | Demand ahead of supply |
Plakats are short-finned bettas, closer to the original fighting fish than the long-finned show forms. They are active, hardy and less prone to fin damage, and they have become a favorite of keepers who want a betta with energy. Giant plakats add size to that appeal. On FishyHub US, both have more demand than listings, which is the strongest sign of real growth in the data.
Dumbo, veiltail and mixed "other" bettas are rising too. Crowntails are the one US betta group without a momentum reading in this data.
The Reef Boom
Every marine fish group FishyHub tracks in the US is rising. That includes the widely listed groups (butterflyfish, clownfish, gobies, tangs and wrasses) and the specialist ones (anglers & frogfish, dragonets, jawfish, pipefish, seahorses and more). Corals and invertebrates are rising across the board as well.
Why reef keeping is growing:
- Better equipment. LED lighting, reliable heaters and controllable pumps have made reef tanks easier to run than they once were.
- Captive breeding. More clownfish, gobies, dottybacks and cardinalfish are captive-bred, and coral is widely grown from cuttings (frags) by hobbyists and farms.
- Nano reefs. Smaller reef tanks make the hobby possible in apartments.
Saltwater is still the smaller share of FishyHub US listings, so this growth is coming from a smaller base than freshwater.
Freshwater Groups Growing From Deep Supply
These freshwater groups already have very high US listings and are still rising:
- American cichlids
- Barbs
- Catfish
- Discus
- Goldfish
- Guppies
- Plecos
- Tetras
These are mainstream fish rather than new trends. Their growth shows merchants adding stock where they expect steady sales, and it suggests the core of American fishkeeping is healthy.
New Niches: Specialist Fish Rising From Limited Supply
| Group | Typical price tier |
|---|---|
| Black arowana | Collector / premium |
| Datnoids | Collector / premium |
| Hatchetfish | Entry-level |
| Jardini arowana | Collector / premium |
| Knifefish | Entry-level |
| Orandas | Mid-range |
| Oscars | Entry-level |
| Ryukins | Mid-range |
| Silver dollars | Entry-level |
On the marine side, batfish, boxfish, filefish, jawfish, pipefish, rays, scorpionfish, sharks and squirrelfish are also rising from limited supply. These are fish for experienced keepers with large or specialized tanks, and rising listings show sellers reaching that audience online.
What Drives Growth in the US
- Online buying. Specialist fish are hard to find in many local stores, so hobbyists search online for specific varieties. That favors niche bettas, arowana and reef fish.
- Shipping. Livestock ships by overnight courier in insulated boxes. Fish that travel well and are valuable enough to justify the shipping cost suit online growth.
- Regional demand. FishyHub does not report growth by state. Hobby context suggests heating costs shape winter buying in the Midwest & Central and East Coast & Northeast zones, while the South & Southeast has a long fish-farming tradition.
Methodology
This page uses FishyHub's US marketplace data for the period from October 2024 to October 2026: momentum (new listings and orders in the recent year against the year before), active listings, listed prices, buyer interest (wishlists, likes and "my tank" saves, reportable for bettas), and demand relative to supply. Findings are reported as directions and tiers, not figures, and groups are listed alphabetically.
Because the US marketplace is new, momentum is rising for nearly every category, and this growth partly reflects FishyHub's own expansion. This data has no US order history and no state-level data. FishyHub does not measure growth in the number of Americans keeping fish. Context on equipment, breeding and shipping is general hobby knowledge.
Frequently Asked Questions
What aquarium fish are growing fastest in popularity in America?
On FishyHub US, halfmoon plakat and giant halfmoon plakat bettas stand out, with rising activity and demand ahead of supply.
Is saltwater fishkeeping growing in the US?
Yes. FishyHub data shows rising activity across every US marine fish group it tracks, as well as corals and invertebrates.
Why is everything rising in FishyHub's US data?
The US marketplace is new, so new listings are growing almost everywhere. FishyHub looks at demand and supply alongside momentum to pick out real growth.
Are arowana becoming more popular in the US?
FishyHub data shows black, jardini and silver arowana all rising in the US, with black and jardini arowana still in limited supply.
How to Cite This Page
Source: FishyHub, "Fastest-Growing Aquarium Fish in America" (2026), https://fishyhub.com/us/blogs/blog-detail/fastest-growing-aquarium-fish-in-america
