Adult Tenebrio molitor are large, shiny, dark brown or black beetles between 12 and 18 millimetres long.
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Adult Tenebrio molitor are large, shiny, dark brown or black beetles between 12 and 18 millimetres long.
Mealworm larvae are white at first, then take on a characteristic yellow color as they mature, reaching about 30 millimeters in length.
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In NAKTASHIF worlds:Gardens, farms and human-associated habitats
Approved version OWNER-REVIEW-20261108T152513722 · last approved 8 November 2026
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