In hydranencephaly, the cerebral hemispheres are transformed into large sac-like fluid-filled cavities, which are covered by thin, partly translucent leptomeninges (Fig. 1b, c).
Although produced by males, the spermatophore is actually formed inside a large, sac-like structure inside the female called the bursa copulatrix.
The eggs hatch, and the larvae complete their development in the large vocal sac.
The larvae hatch in about two weeks and feed on their large yolk sac.
Both sexes have a large throat sac, and their vocal repertoire includes a very harsh shrieking and booming call.
In conclusion, at hatching, silver perch larvae from the captive broodfish measured around 2.5 mm in TL and had a large yolk sac which is completely resorbed at 90 hph, whereas the oil globule remained until 240 hph.
In vegetation near the web you might see the wasp spider's large egg sac, which looks like a pale brown flask supported by a tangle of silken threads.
The newly-hatched silver perch larvae were transparent with a large yolk sac prolonging from the tip of the snout to about half of the ventrolateral of the body (Fig. 1) with an initial mean length of 1.35 ± 0.03 mm and a volume of 0.71 ± 0.07 mm3.
