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According to my research,
a plague has swept this era.
This article is about something that is no longer available. Therefore, it is archived.

Oxygen Algae (氧气藻; pinyin: yǎngqì zǎo) was a plant and an environment modifier in both Plants vs. Zombies Online and Plants vs. Zombies: Journey to the West. It is an aquatic plant, and as such can only be planted underwater. Since most plants cannot be planted underwater, the Oxygen Algae must be used. When planted, the player will be able to plant any other plant in a 3x3 area around it in Plants vs. Zombies: Journey to the West, or a cross-shaped area but can also upgrade the oxygen range by spending sun on it in Plants vs. Zombies Online.


Kelp pic
It is based on kelp, large brown algae seaweeds that make up the order Laminariales.

Its Plants vs. Zombies Online appearance also resembles a ball anemone, a sea anemone in the genus Condylactis, which is actually an animal.


Plants vs. Zombies: Great Wall Edition/Journey to the West

Oxygen Algae was obtained in the Underwater World. It provided oxygen in a 3x3 area around itself.

Plants vs. Zombies Online

Initially, Oxygen Algae releases oxygen in a cross shape around it to let land plants survive in the aquatic environment. It has a meter below it with 3 sections, which is used to show the level of Oxygen Algae. The player can click on the Oxygen Algae to level it up by spending some sun.

  • The first level costs 75 sun and makes the oxygen-supplying range become 3x3.
  • The second level costs 125 sun and makes the oxygen-supplying range become a diamond shape.
  • The third level costs 200 sun and makes the oxygen-supplying range become 5x5.

Almanac entry

Oxygen Algae Almanac entry

Plants vs. Zombies: Great Wall Edition/Journey to the West



“噗咕……噗咕……” 象气蓬默默地吐着气泡,倒不是他愿意一直吐,只怪他昨晚喝了太多的汽水。不过有传言说,他除了吐气泡就不会做别的了


In English:

Oxygen Algae

Oxygen Algae can provide oxygen bubbles to plants on land
Range: Cross-shaped (3x3 in-game)
Must be planted underwater

"Oh...hey..." Like a puffy air bubble, it wasn't that he was willing to vomit, only to blame him for drinking too much soda last night. However, there are rumors that he will not do anything other than spit.

Recharge: fast

Plant Food effect

In Plants vs. Zombies Online, its Plant Food ability is to heal all plants around it into its maximum health.


Plants vs. Zombies: Great Wall Edition/Journey to the West

Plants vs. Zombies Online



  • Algae is actually neither plant, animal, nor fungi. Algae is usually a single-celled organism, however, multi-cellular algae are not unknown to exist.

Specific to Plants vs. Zombies: Great Wall Edition/Journey to the West

  • If it got eaten, the player had 5 seconds to plant another Oxygen Algae before all plants in the 3x3 area where it once was drowned.

Specific to Plants vs. Zombies Online

  • It is the first plant in Plants vs. Zombies Online to be upgradable during the level without the help of a seed packet.
    • Ironically, it cannot be upgraded from the Greenhouse.
V · T · E
Plants vs. Zombies: Journey to the West
Day Peashooter · Sunflower · Cherry Bomb · Wall-nut · Potato Mine · Snow Pea · Chomper · Repeater
Night Puff-shroom · Sun-shroom · Fume-shroom · Grave Buster · Hypno-shroom · Scaredy-shroom · Ice-shroom · Doom-shroom
Pool Lily Pad · Squash · Threepeater · Tangle Kelp · Jalapeno · Spikeweed · Torchwood · Tall-nut
Fog Sea-shroom · Plantern · Cactus · Blover · Split Pea · Starfruit · Pumpkin · Magnet-shroom
Roof Cabbage-pult · Flower Pot · Kernel-pult · Coffee Bean · Garlic · Umbrella Leaf · Marigold · Melon-pult
Underwater World Oxygen Algae · Sea Starfruit · Bramble Sea Grass
The Dragon's Palace Water Gun Grass
Upgrades Gatling Pea · Twin Sunflower · Gloom-shroom · Cattail · Winter Melon · Gold Magnet · Spikerock · Cob Cannon
Others Imitater · Explode-o-nut · Giant Wall-nut · Electric Anemone · Aggro Brocco · Pomegunate · Carrotillery · Oak Archer · Ghost Pepper · Laser Bean · Dandelion · Snapdragon · Bonk Choy
Hero Plants Iron Man Nut · Monkey King Peashooter · Pig Squash · Nut Wujing · Monk Flower · Nezha Peashooter
Plants vs. Zombies Online
Player's House Sunflower · Peashooter · Wall-nut · Potato Mine
Qin Shi Huang Mausoleum Bruce Bamboo · Carrot Rocket · Pomegranate-pult · Dandelion · Venus Flytrap · Winter Melon · Sod
Ancient Egypt Bloomerang · Bonk Choy · Grave Buster · Iceberg Lettuce · Cabbage-pult
Pirate Seas Snapdragon · Spikeweed · Spring Bean · Kernel-pult · Coconut Cannon · Narcissus · Durian · Spikerock · Pineapple Cannon · Threepeater
Far Future Laser Bean · Blover · Citron · E.M.Peach · Tile Turnip · Ganoderma · Banana Tree · Nitration Mushroom · Infi-nut · Magnifying Grass
East Sea Dragon Palace Oxygen Algae · Garlic · Bubble Flower · Electric Anemone · Mine Fruit · Sea Anemone · Litchi · Sea Starfruit
Upgrades Twin Sunflower · Repeater
VIPs Winter Melon
Power Ups Cherry Bomb · Jalapeno
Premium Squash · Snow Pea · Tall-nut
Adventure Mode only Magic Vine · Split Pea · Chili Bean · Lightning Reed · Pea Pod · Melon-pult · Starfruit · Chomper · Fire Peashooter · Cattail · Zorrose · Clivia · Sap-fling · Acidic Citrus · Magic-shroom · Ghost Pepper · Guacodile · Hurrikale · Plantern · Oak Archer · Homing Thistle · Pepper-pult · Radish · Toadstool · Blooming Heart · Red Stinger · Electric Blueberry · A.K.E.E. · Moonflower · Guerrequila · Aspiragus · Pumpkin Witch
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