Shadow Vermin

Shadow Vermin appear in Hyrule Castle Sewers when Link becomes transformed into Wolf Link by Zant after Lakebed Temple. They are sometimes confused with Ghoul Rats.

They appear as small, black squid-like creatures. They can be tricky and annoying at some times because they flail at Link randomly as he swims across water. They can also be hard to spot from a distance.

They also appear in the Palace of Twilight, but the difference is that they have no water to swim in.