Coelacanth and ancient fish vs Medaka Breeder
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Coelacanth and ancient fish
Customize coelacanth colors and feed them to earn points. Excavate fossils for bonuses and purchase new backgrounds and creatures. Experience AR to bring the ancient world into your room.
- Color customization for coelacanth
- Dynamic predation for points
- Fossil excavation with bonus multipliers
- Purchase background images and creatures
- AR function for recreating ancient worlds
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● You can adjust the coelacanth to your favorite color by using the color adjustment food. There is also high point food, and you can get points while looking at the dynamic predation. Points can buy background images and ancient creatures. ● You can get points by excavating fossils and rewarding them. Select a colored stone and tap it carefully to crush the stone. If you take out the fossil inside without damaging it, you will get a perfect bonus. The bonus multiplier will increase as you issue Perfects in succession. The points of fossils change depending on their rarity. Let's get reward food while having fun. ● Equipped with AR function. You can recreate the ancient world in your room.
Medaka Breeder
Experience realistic fish keeping by feeding and cleaning your virtual fish. Watch them grow, breed, and inherit traits from their parents. Customize aquariums and collect various fish species.
- Realistic killifish keeping simulation
- Breed fish and inherit traits
- Customize aquariums with decorations
- Collect over 46 types of killifish
- Missions and rewards system
- Observation and shooting modes
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[Game Features] You can experience realistic killifish keeping in your phone. Taking care of your killifish is very easy: just feed them once every three days and clean the tank. The killifish will eventually grow over time and breed with other adult killifish (2cm or larger). The killifish born from the breeding will inherit the characteristics of their parents. A maximum of 50 killifish can be kept. Up to 10 killifish can be kept in one tank, Up to 5 aquariums can be set up. Functions ■Mode switching Default: Information on the killifish and aquarium is displayed, allowing the user to check the status of their care. Observation: Hides the display of information, allowing you to closely observe the aquarium and killifish. You can also tap on the water surface or the aquarium area to see if there is any reaction! Shooting: This function is useful when you want to hide the information and buttons and take pictures of only the killifish and the aquarium. ■Name your killifish You can name each killifish. You can name each killifish so that even if you have a lot of killifish, you will never lose track of them. Layout of the aquarium You can keep your killifish in your favorite decorated aquarium. There are a total of five types of layouts. Layout types: tank appearance, bottom sand, stones, plants, and ornaments. ■ Shop You can purchase killifish, aquariums and ornaments. There are 46 types of killifish sold in the store! ■Missions You can receive rewards by accomplishing various missions. You can purchase more items such as killifish and aquarium tanks by challenging many missions. ■Revival Chance If you are too busy to take care of your killifish and let them die, don't worry! You can bring them back to life with the Resurrection Chance! Premium Pack (paid feature) Clear ads from auto-display. - Eliminate banner ads - Eliminate interstitial ads Relief mode is released (can be switched). - killifish won't die. Useful functions added - Collective feeding - Collective cleaning All items can be purchased Daily mission rewards tripled 50,000 G present
Screenshots
Verdict
The clearest difference is rating: Medaka Breeder at 4.7 against Coelacanth and ancient fish's 3.7. Medaka Breeder also leads on ads (none vs shown) and update cadence (every 5 days vs every 5 weeks). Coelacanth and ancient fish's advantage is monetization model (ad-supported vs free with in-app purchases). On price, ratings volume, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Medaka Breeder holds the better App Store score, 4.7 against 3.7. Both are backed by a comparable volume of ratings — 7 and 11 respectively. Written reviews point the same way: 50% of Coelacanth and ancient fish's written reviews are positive against 67% of Medaka Breeder's.
Coelacanth and ancient fish ships an update every 5 weeks, Medaka Breeder every 5 days. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.
| Parameter | Coelacanth and ancient fish | Medaka Breeder |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (7 ratings) | 4.7 (11 ratings) — better |
| Positive reviews | 50.0% of reviews | 66.7% of reviews — better |
| Number of ratings | 7 | 11 — better |
| Update frequency | Every 5 weeks | Every 5 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 108 MB | 91 MB |
| Age rating | 4+ | 4+ |
| Developer | Yamabus | Taiho Yanase |
Customer experience
Coelacanth and ancient fish
Medaka Breeder
In-app purchases
Coelacanth and ancient fish
No in-app purchases
Medaka Breeder
No in-app purchases
Questions
Is Coelacanth and ancient fish free?
Is Medaka Breeder free?
Which has better reviews, Coelacanth and ancient fish or Medaka Breeder?
Do Coelacanth and ancient fish or Medaka Breeder have ads?
Which is updated more often, Coelacanth and ancient fish or Medaka Breeder?
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