Mermaid island

It is the fourth island of the game. It is unlocked after defeating the Dragon in Mt. Draco. Volcano Prison is unlocked after defeating the White Shark, the Octopus and the Bluewhale.

Regions
It is divided in seven regions. Each region has its own animals, which some of them may feature elite, mid bosses and bosses too. They are the following ones:

-The central region, in which there are Crabs, Starfish and Hermit Crabs. This region is connected to the northern one, to the southwest region and to the cave that connects to the eastern region. The Druid´s home is located in this region, as well as the Vendor.

-The nothern region, in there are which Clownfish, Sea Anemones, Seahorses and Sunfish (Elite). This region is connected to the central region, to the western region and to the northern cave.

-The western region, in which there are Penguins, Lobsters and the Sperm Whale (Mid boss) and the White. It is connected to the northern region.

-The eastern region, in which there are Moorays, Lionfish, Blowfish (Elite), Spearfish (Mid boss) and the White Shark (Boss). It is connected to the cave that is connected to the central region.

-The southwest region, in which there are Seaotters, Sea Turtles and Elephantseals (Elite). It is connected to the central region and to the southern region.

-The southern region, in which there are Arowanas, Dolphins, Oarfish (Elite) and the Manta Ray (Mid boss). It is connected to the southwest region and to the southeast region.

-The southeast region, in which there are Sawsharks, Hammer Heads, Unicorn Whales (Elite), the Killerwhale (Mid boss) and the Blue Whale (Boss). It is connected to the southern region.

In this island there are two caves too:

-One located in the central region, which is connected to the eastern region. In this cave there are Squids and Jellyfish.

-Another located in the northern region. In this cave there are Monkfish and the Octopus (Boss), too.

In this island teleporting always costs 300 of each material. You can teleport to every portal in the same region, even if you haven't been there before.

Elite
In this island, Elite animals spawn around rocks with their pictures always in groups of six. They appear more frequently at night.

Mid bosses
In this island, Mid bosses appear randomly in their respective regions. They appear after a random period of time. When they appear, a notification appears in the screen. They appear in a random part of the region.

Bosses
In this island, artifacts are needed to summon bosses:

-To fight the White Shark, the Druid must have the Venison equiped.

-To fight the Octopus, the Druid must have the Rock Hammer equiped.

-To fight the Blue Whale, the Druid must have the Horn equipped.

If those artifacts are not equipped, the player will receive the "It seems to require something special" message. The boss may not appear even with the correct artifact and, if that happens, you will have to wait five minutes to try again. The boss can only be summoned once per run.

The main strategy to defeat them is to go with an army of 30 Seaotters, because they are small and range animals. They are mammals, so they benefit from the bonus of the Devil Mask.

White Shark
This boss is found in the eastern region and you need to have the Venison equipped. This boss has two abilities:

-Bite an enemy. It deals more damage than a normal attack.

-Summon four Sawsharks or summon four Hammer Heads (it is possible to tame one of them). It is highly recommended to defeat the White Shark as soon as possible, because this ability may overwhelm you and defeat your army if you give him enough time to kill you. This ability is part of the boss fight's mechanics and if you tame it or use its hero version, your White Sharks won't be able to use this ability.

Octopus
This boss is found in the northern cave and you need to have the Rock Hammer equipped. This boss has two abilities:

-Trap an enemy. It deals more damage to the trapped character and doesn't allow it to move.

-Summon several quick falling spikes in random spots around you. Two deal more than 100,000 damage to the Druid. It is recommended to move your Druid in order to dodge them, as it can't survive four double hits. This ability is part of the boss fight's mechanics and if you tame it or use its hero version, your Octopus won't be able to use this ability.

Bluewhale
This boss is found in the southeast region and you need to have the Horn equipped. This boss has two abilities:

-Summon a wave that deals splash damage.

-Summon an ice storm that makes your Druid attack slower. If the boss goes away, the ice storm will disapear and will appear again if you approach him. This ability is part of the boss fight's mechanics and if you tame it or use its hero version, your Bluewhales won't be able to use this ability.

It is very important to not have the Bomb Bug equiped, because if you summon the boss at night, you may get stuck and the boss will be able to kill your army without effort.