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For the version in Plants vs. Zombies: Journey to the West, see Oxygen Algae.

Oxygen Algae (氧气藻; pinyin: yǎngqì zǎo) was a plant and an environment modifier in Plants vs. Zombies Online. It was 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 cross-shaped area but can also upgrade the oxygen range by spending sun on it.

About

Oxygen Algae was the first plant obtained in the East Sea Dragon Palace. It released oxygen in a cross shape around it to let land plants survive in an aquatic environment. If eaten the surrounding plants would slowly take damage until either defeated or until another Oxygen Algae is planted in a nearby vicinity.

It also had a meter below it with 3 sections, which was used to show the level of Oxygen Algae. The player could click on the Oxygen Algae to level it up by spending some sun.

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

Origins

Oxygen AlgaeJttW.png

Oxygen Algae is based on the plant of the same name from Plants vs. Zombies: Journey to the West, who in turn was based on kelp, large brown algae seaweeds that make up the order Laminariales.

Its appearance could additionally be based on the bubble algae (Valonia ventricosa), a species of green algae found in many oceans throughout the world in tropical and subtropical regions and is one of the largest unicellular organisms on earth.

Almanac entry

氧气藻

水中不可或缺的重要植物
能提供必备氧气

塔防:
给局部地区进行供氧,以种植陆地植物,保护范围会随着等级提升而增大

技能: 无
消耗阳光: 50
伤害: 无
冷却时间: 较短

    In English: Oxygen Algae

    Necessary underwater, a very important plant.
    Provides essential oxygen.

    Tower defense:
    Supplies oxygen to surrounding area, allowing land plants to be planted, range of oxygenated area will increase as it is leveled up.

    Skills: None
    Sun cost: 50

    Damage: None
    Recharge: Fast

Plant Food effect

Its Plant Food ability was to heal all plants around it to their maximum health.

Gallery

Trivia

  • Algae is actually neither plant, animal, nor fungi. Algae is usually a single-celled organism, however, multi-cellular algae are not unknown to exist.
  • It was the first plant in Plants vs. Zombies Online to be upgradable during the level without the help of a seed packet.
  • It could not be upgraded from the Greenhouse.
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Plants vs. Zombies
Day Peashooter · Sunflower · Cherry Bomb · Wall-nut · Potato Mine · Snow Pea · Chomper · Repeater
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Removed Rotten Red
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East Sea Dragon Palace Oxygen Algae · Garlic · Bubble Flower · Electric Anemone
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 · Mine Fruit · Sea Anemone · Lychee Drill · Sea Starfruit
Plants vs. Zombies 3
Neighborville Sunflower · Wall-Nut · Bamboo Shoots · Peashooter · Bonk Choy
Lost Keys Lake Lily Pad · Tangle Kelp · Squash
Mt. Quesogrande Chili Bean · Silversword · Cabbage-Pult
Power-Ups Grapes of Wrath · Chilly Pepper · Jalapeño · Cherry Bomb · Blover
Pre-2021 Puff-Shroom · Buttercup · Garlic · Potato Mine · Pushywillow · Chard Guard · Spikeweed · Kernel-Pult · Caramel Popcorn · Lightning Reed · Melon-Pult · Shuffle Truffle · Blockbuster · Butternut Squash · Ragweed · Sawgrass · Fire Peashooter · Pine Needler · Snow Pea · Night Cap · Aloe Vera · Sweet Potato · Hydrangea · Dogwood · Chomper · Flak Seed · Gravitree · Gloom-Shroom · Lemon-Aid · Starfruit · Snapdragon · Fairy Ring Mushroom · Kalestorm · Star Tree · Magic Beans
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