Story: Life in fresh water

Spiral caddis (5th of 6)

Spiral caddis

Larvae of the native spiral caddis (Helicopsyche species) make spiral cases using tiny grains of sand, which they attach to their bodies. The weight of the case helps anchor the caddis to the stream bed in fast flowing waters. Typically the species are 2.5 millimetres across, and are found only in very clean waters.

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Photograph by Stephen Moore

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How to cite this page:

Roger Young, 'Life in fresh water - Invertebrates', Te Ara - the Encyclopedia of New Zealand, (accessed 26 February 2024)

Story by Roger Young, published 24 Sep 2007