Marine Biologist is a Super Rare variant of Scientist in Plants vs. Zombies: Garden Warfare and Plants vs. Zombies: Garden Warfare 2. He is mighty and devastating at a close range, with an ability to deal around 45 damage (when not upgraded) or 50 damage (when upgraded), downgrading to 8 damage at far distances and 11 when upgraded.
The Marine Biologist and his Dolphin Zombie Companion are a dangerous pair. They are able to effectively spray fish innards with an almost unmatched style and effectiveness.
In-game description
The Dolphin Blaster deals huge, fishy damage at close range!
The primary weapon of the Marine Biologist is the Dolphin Blaster. It fires more rapidly than other Scientist variants and deals 10 impact damage at long range and 20 impact damage at close range. At point-blank range, his weapon deals 25 spread damage. His weapon holds 6 ammunition (7 when upgraded).
An alternate ability of Sticky Explody Ball, Mega Heal Bomb is a huge ball like the Sticky Explody Ball with a bigger radius. Heals all zombies in its radius by 50 health.
An alternate ability of Warp, Energy Warp allows the Scientist to transform into pure energy (he is invincible in this state). The Scientist is able to travel freely but cannot jump or attack. It also gains a small speed boost.
An alternate ability of Zombie Heal Station, Armored Heal Station heals at a slower rate than the Zombie Health Station, and self-destructs the same time as the Zombie Heal Station. Its incredible size allows players to jump on it to get to most buildings.
The Heal Beam of Science is the Scientist's first activatable ability. Similar to Heal Beam, it will heal any zombie targeted by it, healing faster the closer the Scientist is to the healed target.
An alternate ability of Zombie Heal Station, Armored Heal Station heals at a slower rate than the Zombie Health Station, and self-destructs the same time as the Zombie Heal Station. Its incredible size allows players to jump on it to get to most buildings.
An alternate ability of Warp, Energy Warp allows the Scientist to transform into pure energy (he is invincible in this state). The Scientist is able to travel freely but cannot jump or attack. It also gains a small speed boost.
An alternate ability of Sticky Explody Ball, Mega Heal Bomb is a huge ball like the Sticky Explody Ball with a bigger radius. Heals all zombies in its radius by 50 health.
Upgrades
Garden Warfare
Description about the Marine Biologist's weapon upgrades
Less Slippery Fish
The fish snacks for Dolphin Zombie are less slippery, resulting in faster reload times.
Improved Dolphin Hunger
Dolphin Zombie is hungry and able to store more fish guts, resulting in an increase to ammo capacity.
Genetically Modified Fish
By using Genetically Modified Fish for food, the Dolphin Zombie spits out more damaging fish guts.
Garden Warfare 2
Health Regeneration Delay Upgrade
This upgrade decreases the delay before health regeneration begins!
Zoom Upgrade
This upgrade increases the zoom distance of your primary weapon!
Health Regeneration Upgrade
This upgrade increases how quickly your health regenerates!
Speed Upgrade
This upgrade allows you to move faster!
Reload Upgrade
This upgrade decreases your reload time!
Ammo Upgrade
This upgrade increases the number of times you can fire before reloading!
Damage Upgrade
This upgrade increases your primary weapon damage!
Health Upgrade
This upgrade increases your maximum health!
Strategies
For
Use the Marine Biologist in close-quarter maps and areas to do maximum damage to your enemies. Save your Warps to get close to an enemy. If it is too overwhelming, use your second Warp to get away and heal yourself. The Marine Biologist is extremely powerful, but do not blindly run into the plants, as they can take you out very quickly due to your low health. Instead, sneak up on them and prepare to attack the moment you get the chance. Marine Biologist is capable (when upgraded) of vanquishing most Sunflower variants in two shots (except Metal Petal, who takes three shots to vanquish), Rose variants, and even Agent Pea and taking out most Citron variants in four shots. He is very effective against most Cactus variants, as they are not suited for close-range combat. The Dolphin Blaster's fast rate of fire and high damage output are sure to get you some quick vanquishes without losing much health or being vanquished. If you are agile enough, using your Warp ability to its full potential in situations like these also tends to help you escape alive and well or vanquish more enemy plants. Remember to be constantly moving, making you a more challenging target to hit. Using the Energy Warp is less effective with the Marine Biologist due to his nature. The Energy Warp is slower and more noticeable than the regular Warp and will give the plants more time to retaliate. However, it does provide good coverage for escaping. If you are good at sneaking in on enemies, attack, then use the Energy Warp for quick exits. If not, the Warp will help immensely. A good strategy is to sneak up on rooted plants and quickly defeat them. A Peashooter using the Pea Gatling can be dangerous, so make sure you have a good amount of health if he turns around.
Against
Stay far away from the Marine Biologist and go for critical hits to take him out quickly. If he Warps towards you, the best strategy is to get critical hits or use abilities to get away from him. However, you will likely die without quick reactions most of the time, especially for Sunflowers and Roses. For the Peashooter, use either Hyper or Super Pea Jump to run away or run around him, so you are a more challenging target to hit and can get critical hits. For the Chomper, Chomp or spray the Marine Biologist; however, getting away from or vanquishing him with the Burrow is a much better idea. Place down some Spikeweeds so you can get away easier. For the Sunflower, make sure you plant either your Heal Flower or Dark Flower to heal yourself or attack him while aiming for critical hits. For the Cactus, try vanquishing him from long range. If he gets too close, place Potato Mines, so he must tread carefully to avoid being vanquished. Placing Tallnut Battlements also will help you stay alive longer as he has to aim higher on your body to hit you. Once again, aim for his head for critical hits. As a Citron, either use your Citron Ball to escape or activate your Peel Shield immediately. Stunning him with the EMPeach makes him vulnerable, allowing you to attack him without much resistance. Your high health should give you enough time to try and turn around to kill the Marine Biologist. Kernel Corns should try Husk Hop to jump away and potentially kill the Marine Biologist. Rose should use her Arcane Enigma to escape or use her other abilities to stall or weaken him.
It makes dolphin sounds when it shoots and reloads.
The glasses he wears are also equipped with his tank helmet, which is peculiar since the glasses are not connected with the tank helmet. This also happens with the dinosaur helmet that the Paleontologist wears.
When he reloads, you can see that he tosses a fish cracker up in the air, and the dolphin then eats it in the last second before it falls to the ground.
In Garden Warfare 2, he no longer wears glasses.
According to the Zoologist's Stickerbook description, the Marine Biologist was taught marine biology at "Zomboss' Marine Biology and Fish Sticks Academy."
The Stickerbook description also says that both him and the Zoologist were fierce rivals.
The hat icon for him is also used by Dr. Toxic for an unknown reason.