Dark Eco - Jak and Daxter Collection Guide - IGN

With its ability to warp and mutate, Dark Eco is considered the most dangerous kind of Eco. Large amounts resemble a thick black ooze with a purple sheen;

Jak 3 - ps2 - Walkthrough and Guide - Page 8 - GameSpy

Forbidden Jungle - Jak and Daxter Collection Guide - IGN

Walkthrough: Act 1 - Jak 3 Guide - IGN

Jak and Daxter: The Precursor Legacy HD - Walkthrough Part 4 - Giant Fish! [PS3]

Walkthrough: Act 1 - Jak 3 Guide - IGN

Eco, Jak and Daxter Wiki

How long is Jak and Daxter Collection?

Dark eco, Jak and Daxter Wiki

Every Naughty Dog Game: A Full History of Releases in Order - IGN