Grotworms in goo can be found in Phalaks' lab, at the bottom level of the Grotworm Lair. The player visits this lab during Hero's Welcome. Phalaks mentions in a journal that he pften experiments on grotworms.
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- ^ Phalaks' experiment log, written by Phalaks, "Hero's Welcome", RuneScape. "In short, bone can flex like muscle while muscle tissue stiffens to make the 'frame' against which the bone-muscle pulls. Experiments in producing this effect in Grotworms and humans has been unsuccessful to date."