Lúðumóðir

Lúðumóðir (halibut mother) is a oversized halibut/flounder said to live around Iceland. It is said to be the mother of all the halibuts/flounders in the world. It was first seen during the 1700's and is a rare encounter now. But teachers still talk about this monster in schools.

Fishing
It is said that if you catch and kill a halibut mother you will be cursed with unluckiness while fishing forever.

The cursed island
One day, a group of man went fishing, they fished for a whole day, they got back, and they also did bring their catch with them, it was a halibut mother. They skinned the beast and ate it. After that, they always had bad luck while fishing, and the island was cursed.

Lost fishermen
There where once 8 fishermen, they went fishing and told everybody about it. In the middle of the sea they ecountered another ship, Then they said that they saw a giant creature, the ship went passed them and the fishermen where never seen again.

Description
Many have seen the beast, they say that it's grey or brown in color, and has shells and seaweed growing on it. They say that the beast is the size of a small boat or the size of one big ship.