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;

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Dark eco, Jak and Daxter Wiki

Walkthrough: Act 1 - Jak 3 Guide - IGN

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Jak and Daxter Collection Guide - IGN

Dark Jak, Jak and Daxter Wiki

Dark Jak's Instagram, Twitter & Facebook on IDCrawl

Jak 3 - ps2 - Walkthrough and Guide - Page 5 - GameSpy

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