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DescriptionA small green alga (up to 30 cm long) with a dichotomously branched, cylindrical frond. The frond is solid and spongy with a felt-like touch and has many colourless hairs which can be seen when the plant is immersed in water. The holdfast is disc-like and formed from many fine threads.Codium tomentosum can be confused with Codium fragile. However, Codium tomentosum tends to have a more slender frond with rounded tips whereas Codium fragile has pointed tips to the frond.