The egg deposition is followed by the backward withdrawal of the anterior segments from the cocoon. This process, referred to as egg deposition, is accomplished within 30 s. Coelomic eggs are individually squeezed out of the female gonopores located near the midpoint of the cocoon. TikTok video from Dansoy's Fish (dansoysfish): 'Tubifex worms Happy fishkeeping everyone'.
As this tapping ceases, the coelomic eggs begin to move to the space between the cocoon and the clitellum.
Within a few seconds of the eggs moving into the ovarian coelom, the clitellar region begins to change its contour slightly it looks as if something round is tapping on the coelomic wall of this region. Such movements are repeated several times before the ovisac eggs settle in the ovarian coelom of segment 11. Within a second or so, ovisac eggs emerge out of the posterior margin and return to the posterior segments. (18) have demonstrated that 70 cow dung and 30 field soil is the suitable food medium for optimal growth of tubifex worms while Mandal et al. After the formation of a lemon shaped cocoon around the clitellum at segments 11 and 12, mature eggs that have been stored in the ovisac at segments 12–14 begin to move into segments 11–12 through the constricted posterior end of the cocoon. In the present study, videos were recorded to observe oviposition in living, mature worms of Tubifex tubifex.
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