Which fish & aquarium brands do AI assistants recommend in South Korea? Q4 2026
In South Korea, AI assistants most often recommend Tetra, Hikari and Sera for fish. Tetra is named by 5 of 5 assistants.
What the data says
Tetra (Spectrum Brands) is the fish & aquarium brand AI assistants recommend most in South Korea, taking 31% of all recommendation points across 5 assistants. Hikari follows with 29% and Sera is third with 16%.
The top spot is close: only 2 points separate Tetra and Hikari, so a small change in how either brand is described online could flip the order.
ChatGPT, Claude and Grok put Tetra first, while DeepSeek favours Hikari and Gemini favours Hikari.
The top five brands hold 88% of recommendations out of 10 brands named in total, so AI answers in this category are highly concentrated.
| # | Brand | Owner | AI share | ChatGPT | Claude | DeepSeek | Gemini | Grok |
|---|---|---|---|---|---|---|---|---|
| 1 | Tetra | Spectrum Brands | 31% | 35 | 35 | 25 | 25 | 35 |
| 2 | Hikari | Kyorin | 29% | 25 | 25 | 35 | 35 | 25 |
| 3 | Sera | Sera GmbH | 16% | 8 | 20 | 12 | 20 | 20 |
| 4 | API | Mars | 8% | – | 8 | 20 | – | 12 |
| 5 | JBL | Harman | 4% | 20 | – | – | – | – |
| 6 | Ocean Free | Ocean Free | 4% | 12 | – | – | 8 | – |
| 7 | Tropical | Tropical Group | 2.4% | – | – | – | 12 | – |
| 8 | Aqueon | Central Garden & Pet | 2.4% | – | 12 | – | – | – |
| 9 | Guppy | Guppy Aquatics | 1.6% | – | – | – | – | 8 |
| 10 | Wardley | Hartz Mountain Corporation | 1.6% | – | – | 8 | – | – |
Questions about AI fish & aquarium recommendations
- Which fish & aquarium brand does ChatGPT recommend most in South Korea?
- ChatGPT recommends Tetra most often for fish & aquarium in South Korea. Across all assistants, Tetra leads with 31% of recommendations.
- Which fish & aquarium brand is improving fastest in South Korea?
- Hikari has the strongest momentum among challengers: AI names it first in 2 of 5 answers where it appears, while holding 29% share. This is the first Q4 2026 reading; change over time will be shown from the next update.
- How is the ranking calculated?
- We ask each AI assistant the questions shoppers ask in each category and market, record the top five brands it names, and give 35, 25, 20, 12 and 8 points for positions one to five. Share is a brand's points divided by all points awarded.
Fish: AI rankings by country
Covers: Fish Food.
Method: each AI assistant is asked the shopper questions for every segment in the category and market; the top five brands named score 35, 25, 20, 12 and 8 points. Share is a brand's points divided by all points awarded. Rankings reflect AI answers, not sales.
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