As of 1.0.17 (2026-10-15)
Coral Keeper has 28 base crew types + 8 variants, and the lead individuals, the Reef Keepers, are 24 real crab species. This page is compiled from the game data.
How to read this
- Cost: the number of Bubbles it costs to buy the card in battle (3 · 5 · 8), and also the type of deck slot (3 3-Cost · 3 5-Cost · 3 8-Cost).
- Grade: within the same Cost, crew are split into Normal · Rare · Epic, shown by the glow color of the card border. Crew you get later on the Sea Route tend to have higher grades.
- Weakness type: crew of the same type as the badge above an enemy's head (Pierce · Poison · Area · Boss) deal 1.5× damage. Crew with no type are marked "-".
- Attack target: crew with no note attack the enemy closest to the coral first.
- ★ Merge: 2 identical crew → ★2 (about 2.3× attack), 2 ★2 crew → ★3 (about 5.8×). The maximum is ★3.
- Level (1-10): raised with crew cards and Shells. At Lv5, 8, 9 and 10, a special effect triggers with a 10%, 25%, 50% and 80% chance respectively.
3-Cost crew (9 types)
| Name | Grade | Weakness type | Role | Features | Level effect | How to get |
|---|---|---|---|---|---|---|
| Mud Crab | Normal | Area | Area attack | Mud ball area attack, mud puddle slows | Mud puddle (50% slow for 2s) | From the start |
| Hermit Crab | Normal | - | Rapid fire | Rapid fire | 2-shot rapid fire | From the start |
| Barnacle | Normal | Area | Mine | Plants barnacles on the path enemies take; they burst when stepped on and slow | Stuns for 1s on burst | From the start |
| Anemone | Rare | Poison | Poison | Poison ×3 stacks | Poison ×5 stacks | Sea Route trophies 40 |
| Swimming Crab | Rare | Pierce | Double strike | Double-claw strike | Triple strike | Sea Route trophies 351 |
| Clownfish | Rare | - | Rapid fire | Rapid fire, ATK speed +30% next to an Anemone | 2-shot rapid fire | Sea Route trophies 66 |
| Cleaner Shrimp | Epic | - | Support | Adjacent neighbors' ATK +20% (grows with level and ★), weak bubble attack | Cheers up to ±2 slots to each side | Sea Route trophies 168 |
| Sea Hare | Epic | Poison | Slow | Ink spread: nearby enemies also take half damage and are slowed for 1.5s | Ink slow +20%p | Exclusive pack (see below) |
| Sea Squirt | Normal | - | Stun | Water jet stuns for 1.2s (varies with ★) | Shockwave also stuns nearby enemies | Reach Deck Power 2,000 |
5-Cost crew (10 types)
| Name | Grade | Weakness type | Role | Features | Level effect | How to get |
|---|---|---|---|---|---|---|
| Thief Crab | Normal | - | Bubble steal | Targets the enemy with the lowest HP, and has a chance to gain Bubbles on a kill | Higher chance and amount of Bubbles on kill | From the start |
| Fiddler Crab | Normal | Pierce | Smash | Slow, but 20% crit (×2.5), targets the enemy with the most HP | 40% crit | Reach Deck Power 1,500 |
| Seahorse | Normal | - | Support | Adjacent neighbors' ATK speed +35% (grows with level and ★), weak bubble attack | Cheers up to ±2 slots to each side | From the start |
| Nudibranch | Rare | Poison | Poison cloud | An AoE poison cloud that lasts 3 seconds | Poison cloud lasts 5s | Sea Route trophies 989 |
| Pistol Shrimp | Rare | - | Stun | Shockwave: damages everything around the point of impact + stun 1.2s | Shockwave also stuns nearby enemies | Exclusive pack (see below) |
| Pufferfish | Rare | Area | Burst | Spike burst, enemies closer to the coral take ×2 damage | Burst area ×1.5 | From the start |
| Sunfish | Rare | - | Knockback | Body slam knocks the enemy hit back along the path (half on bosses) | Knockback ×1.5 | Reach Deck Power 3,300 |
| Moray Eel | Epic | Pierce | Charge | Charging bite: lunges to the rearmost enemy (nearest the entrance) and bites it; other enemies on the path take half damage | Lunge damage ×1.8 | Sea Route trophies 524 |
| Cone Snail | Epic | Poison | Poison spread | Poison harpoon, poison spreads to 2 nearby enemies | Poison spreads to 3 enemies | Sea Route trophies 736 |
| Sea Otter | Epic | Boss | Armor Shatter | Stone throw: the enemy hit ignores armor for 6 seconds and takes +25% damage, targets bosses first | Shatter also hits 2 nearby enemies | Exclusive pack (paid) or collect it for free (see below) |
8-Cost crew (9 types)
| Name | Grade | Weakness type | Role | Features | Level effect | How to get |
|---|---|---|---|---|---|---|
| Mantis Shrimp | Normal | Pierce | Fast pierce | Lightning punch, ignores Sea Urchin armor, targets the enemy with the most HP | Pierces to enemies behind in the same column (50%) | From the start |
| Octopus | Normal | Area | Multi-hit | Hits 3 enemies at once + slow | Hits 5 enemies at once | Reach Deck Power 2,800 |
| Giant Clam | Normal | - | Eco · Support | Produces Bubbles (+1 per ★), adjacent neighbors' ATK +25%, weak pearl attack | +1 extra production | Arena season reward for Coral League or higher |
| Horseshoe Crab | Rare | Boss | Boss Hunter | Boss damage ×3, targets bosses first | Boss damage ×2.7 (×4 on weak spot) | Reach Deck Power 4,500 |
| Sea Turtle | Rare | - | Knockback · Guardian | Knocks the enemy hit back (half on bosses), +10 Coral HP each turn, taunts in the Arena | Knockback ×1.5 | Exclusive pack (see below) |
| Giant Squid | Rare | Area | Global slow | Ink storm: damages all enemies + 30% slow for 2s | 50% slow | Sea Route trophies 1,274 |
| Anglerfish | Epic | Boss | Lure | Pulls the frontmost enemy back and smashes it | Pulls 2 enemies | Sea Route trophies 1,618 |
| Manta Ray | Epic | Pierce | Launches babies | Baby rays (2 per ★) split up and fly above and below to attack | Baby Ray attack ×1.5 | Sea Route trophies 1,972 |
| Hammerhead Shark | Epic | Pierce | Charge | Charging bite (starting with the rearmost enemy), other enemies on the path take half damage | Lunge damage ×1.8 | First free Chest in the Shop (guaranteed) |
How to get these crew
Ways everyone can get them (excluding exclusive-pack crew, and only crew you don't have yet)
- Deep-Sea Chest (120 Pearls): guarantees 1 crew type you don't own yet. If you own them all, you get 30 crew cards.
- Starter Pack (one-time purchase): 1 unowned 5-Cost or 8-Cost crew type + 300 Pearls + 30 crew cards + 3,000 Shells.
- Arena win cards: when you win in the Arena (up to 5 wins a day), there is a low chance of a card for a crew member you don't have. Collect 5 and pay Shells to recruit it. The recruiting cost (Shells) is the base value per Cost (3 · 5 · 8-Cost = 800 · 1,500 · 2,500) multiplied by a grade multiplier (Normal ×1 · Rare ×1.5 · Epic ×2.4) and rounded to the nearest 100. For example: Anemone 1,200, Moray Eel 3,600, Anglerfish 6,000.
- Sea Route trophies: for crew listed with "Sea Route trophies" in the tables above, you collect trophies to unlock the slot and then tap Claim yourself.
- Reaching Deck Power: the Fiddler Crab (1,500), Sea Squirt (2,000), Octopus (2,800), Sunfish (3,300) and Horseshoe Crab (4,500) join automatically once your Deck Power passes the threshold.
Exclusive-pack crew (Sea Hare · Pistol Shrimp · Sea Turtle · Sea Otter)
| Crew | Cost | Pack | Contents |
|---|---|---|---|
| Sea Hare | 3 | Sea Hare Exclusive Pack ₩1,000 | Sea Hare + 1,000 Shells + 20 Pearls |
| Pistol Shrimp | 5 | Pistol Shrimp Exclusive Pack ₩3,000 | Pistol Shrimp + 3,000 Shells + 50 Pearls |
| Sea Otter | 5 | Sea Otter Exclusive Pack ₩3,300 | Sea Otter + 3,300 Shells + 60 Pearls |
| Sea Turtle | 8 | Sea Turtle Exclusive Pack ₩5,000 | Sea Turtle + 5,000 Shells + 130 Pearls |
- They are not always on display in the Shop. They appear as 48-hour limited offers that show up occasionally after you clear a stage with 1 or more stars. In the Apps in Toss (mini-apps inside the Toss app) version, the amount includes VAT, so it differs by a few tens of won (for example: Sea Hare ₩990, Pistol Shrimp ₩2,970, Sea Turtle ₩4,950).
- The Sea Hare, Pistol Shrimp and Sea Turtle are made a little stronger than regular crew so they are worth buying (the Sea Hare's ink spreads to nearby enemies, the Pistol Shrimp has a wider shockwave area, and the Sea Turtle taunts in the Arena).
Getting paid crew for free
- Sea Otter: you can also collect it for free. 1 ad = 1 Sea Otter card (2 times a day), and 25% of Arena win cards are Sea Otter cards. Collect 30 cards and pay 3,600 Shells to recruit it. With 2 ads and 5 Arena wins a day, it takes roughly 9-10 days. The ONE store version gives you the cards instantly with no ads.
- Sea Hare · Pistol Shrimp · Sea Turtle: for now, they can only be obtained through their exclusive packs, and there is no free way to collect them. They don't come from Chests, the Starter Pack or Arena cards either. (You can build a deck from the other 25 crew types without them. In the developer's bot measurements, even random decks built with no purchased crew won nearly half the time (49%) on Stages 5, 7 and 9.)
Variant crew (8 types)
These are "II" crew, which have a changed color and a different attack style from the base crew. You must own the base crew and claim them yourself in the Sea Route trophy slot. In a deck you can put only one of the base and the variant, and they share level and cards with the base crew. Their grade is Epic.
| Variant | Base crew | Sea Route trophies | Features |
|---|---|---|---|
| Mud Crab II | Mud Crab | 1,430 | Wide mud ball (1.5× area, −30% damage) |
| Hermit Crab II | Hermit Crab | 1,782 | 3-shot spread |
| Barnacle II | Barnacle | 2,170 | Shock Barnacle: stuns on hit |
| Swimming Crab II | Swimming Crab | 2,284 | Critical claw 20% (×2.5) |
| Seahorse II | Seahorse | 2,605 | Bubble shot: slows on hit |
| Pistol Shrimp II | Pistol Shrimp | 2,707 | Shock blast: area damage |
| Octopus II | Octopus | 2,830 | Poison ink: poison spreads to 2 enemies |
| Giant Clam II | Giant Clam | 2,914 | Pearl beam: pierces the whole column |
Symbiosis (place a pair on either side of each other and both get stronger)
| Pair | Name | Effect |
|---|---|---|
| Hermit Crab + Anemone | Anemone Shell | Hermit Crab's rapid fire gets poison, Anemone's ATK speed +30% |
| Nudibranch + Anemone | Stolen Stingers | Nudibranch's poison cloud damage +50% and slow, Anemone's ATK speed +30% |
| Clownfish + Anemone | Home in the Anemone | Clownfish's ATK speed +30%, Anemone gains +1 stack of Poison |
| Cleaner Shrimp + Moray Eel | Cleaning Symbiosis | Cleaner Shrimp's neighbor ATK +30%, Moray Eel's lunge damage +30% |
| Horseshoe Crab + Barnacle | Barnacle Shell | The Horseshoe Crab drops a mine on every hit, Barnacle mines +1 |
| Sea Otter + Giant Clam | Clam Cracking | Sea Otter damage +30%, Giant Clam production speed +30% |
Reef Keepers (lead individuals, 24 real crab species)
A Reef Keeper is the lead crab that lives on the Mother Coral. It doesn't go in your deck and smashes 2 targets at once. When its gauge is full, it uses a Rage skill (skills come in 12 families × 4 grades: Normal · Rare · Epic · Legendary). They have a species, carapace width and color variants, and you collect them through egg hatching and Breeding.
- How to get them: hatching a Shell Egg (1,200 Shells), Pearl Egg (60 Pearls) or Golden Egg (220 Pearls), ♂♀ Breeding, and having a stage boss join (fill 9 stars). Your first Shell Egg is free once, after you clear Stage 1. You have 3 nest slots by default, and unlocking the Deep-Sea Pass Premium adds 3 more.
- Egg grade odds: Shell Egg: Common 75% · Rare 25% / Pearl Egg: Common 30% · Rare 45% · Heroic 22% · Legendary 3% / Golden Egg: Rare 35% · Heroic 55% · Legendary 10%.
- Base color variant odds: Normal 93% · Blue 3% · Golden 2% · Albino 1% · Split 0.7% · Ghost 0.3% (rare variants appear more often depending on the egg type).
- Paid Reef Keeper packs: Snow Crab Reef Keeper (₩29,000, a Heroic Snow Crab ♂ + 1,200 Pearls + 25,000 Shells), King Crab Reef Keeper (₩59,000, a Legendary King Crab ♂♀ pair + 1,500 Pearls + 40,000 Shells). They are limited offers that occasionally appear when you clear after Stages 3 and 5, and you can also get the same species for free through eggs, Breeding and stage-boss joins.
| Habitat | Species (grade) |
|---|---|
| West Sea Tidal Flats | Thief Crab (Rare), Fiddler Crab (Rare), White-Clawed Fiddler Crab (Rare), Sentinel Crab (Common), Shore Crab (Common), Sand Bubbler Crab (Common), Chestnut Crab (Rare), Chinese Mitten Crab (Common), Long-Toed Hermit Crab (Common), Ghost Crab (Heroic, a protected marine species so observation record only) |
| South Sea · Jeju | Swimming Crab (Rare), Asian Paddle Crab (Common), Horseshoe Crab (Legendary, event only) |
| East Sea | Horsehair Crab (Rare), Snow Crab (Heroic), Red Snow Crab (Heroic) |
| World Rarities | King Crab (Legendary), Japanese Spider Crab (Legendary), Coconut Crab (Heroic), Boxer Crab (Heroic), Decorator Crab (Heroic), Knobby King Crab (Heroic), Fan Crab (Common), Yeti Crab (Legendary) |