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Sexual interaction occurs and the females deposit their eggs into the water column after which they sink to the seabed. The eggs hatch after about twenty-five hours. [ 5 ] Some special characteristics found in only female blue parrotfish are that there is an existence of an annual immature all-female group.
Parrotfish are named for their dentition, [5] which is distinct from other fish, including other labrids.Their numerous teeth are arranged in a tightly packed mosaic on the external surface of their jaw bones, forming a parrot-like beak with which they rasp algae from coral and other rocky substrates [6] (which contributes to the process of bioerosion).
The green humphead parrotfish, is sexually monochromatic, i.e. there is no initial or terminal phase in the life cycle of the adults. [4] The fish spawn pelagically near the outer reef slope or near promontories, gutters, or channel mouths during a lunar cycle, usually spawning just prior to the new moon. [5]
This species is endemic to the southwestern Atlantic Ocean, such as in the Brazilian waters, and occurs at depths from 1–60 m with a temperature range of 24-28 °C. [3] Scarus zelindae and Scarus trispinosus are the only parrotfish species that are endemic to the Southwestern Atlantic. [ 3 ]
Cetoscarus bicolor, also known as the bicolour parrotfish or bumphead parrotfish, is a species of fish belonging to the family Scaridae. It is found only in the Red Sea. Being from the Scaridae family of huge, vividly colored fish, which is well known as a main contributor of marine ecosystems, especially coral reefs by maintaining them.
Spawning occurs in shallow water over flat seagrass beds on the ebbing tide. As well as being gonochoristic , marbled parrotfish also show less sexual dimorphism than most other parrotfishes. Their diet consists of sea grass and algae. [ 2 ]
Scarus ferrugineus.Adult, initial phase Adult, terminal phase. Scarus ferrugineus measures up to 41 cm (16 in) in length. [2] Two colour patterns may be distinguished. [3] While the terminal phase is multicoloured, bright in colour, mostly blue-green, the initial phase, in which frequently these fishes are seen in groups, is brownish (hence the common name) with light and dark bands and a ...
Although the specific reproductive process is unknown in the Natal knifejaw, its family member, Oplegnathus punctatus, also known as the Spotted knifejaw, was studies and results showed that on spawning days, the water temperature was warmer, 21.1°C to 24.6°C, when the average temperatures ranged from 18.8°C to 29.6°C. [10]