Female Reproductive organs

• The female reproductive organs comprise the ovary and oviduct.
• The ovary about oviduct and transverse of ova is distinguished into cytovarian, semicytovarian, and gymnovarian types.
• In the cytovarian type, the lumen of the ovary is connected with the oviduct and released in water through the genital pore.
• In the semicytovarian type, the oocytes in place of the oviduct pass through a funnel-shaped transparent groove, which opens into the genital pore.
• Gymnovarian type of ovary is not continuous with the oviduct.
• The female reproductive organs consist of a pair of ovaries which are elongated sac-like structures lying in the posterior part of the abdominal cavity ventral to the kidney just beneath the air bladder.
• They are attached to the body wall using a mesovarium.
• They produce eggs. The color varies, most often ranging from whitish in the young through greenish when immature to golden yellow (Yolk color) in ripe adults.
• Oviducts are very short or lacking in teleost.

a) Ovaries:

• It possesses follicular cells and tunica albuginea.
• Fresh eggs may develop from the germinal epithelium throughout life.
• Corpora lutea are found only in mammals, and in some elasmobranch fish; in other species, the remnants of the follicle are quickly resorbed by the ovary.
• The ovary of teleost often contains a hollow, lymph-filled space that opens into the oviduct, and into which the eggs are shed.