Spawn is deposited as a string of about 200 ova wrapped like a ball of wool within a spherical, transparent, colourless, gelatinous capsule with diameter of about 1.5 mm. The capsule is attached to the substrate by a gelatinous stalk (1). Individual egg cases are transparent colourless showing the whitish embryos with a distinct pitchy spot. The embryos rotate slowly within the ova.

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