Basically a secondary sexual trait can be divided into two, namely:
a) secondary sexual nature are temporary, just show up at the time of spawning season only. For example, "ovipositor", fish Rhodeus amarus is a tool that is used to distribute the eggs to the bivalves, the kind of acne on his head during the spawning season. Many acne with typical arrangement in a particular species can be used to determine the sign of the species, eg fish and Semotilus atromaculatus Nocomis biguttatus males.
b) secondary sexual nature that is permanent or permanent, that this sign remains there before, during and after the spawning season. For example, black dots mark the male fish Amia calva, gonopodium in Gambusia affinis, clasper in group Elasmobranchia fish, color light on fish Lebistes, Beta and reef fish, fish in fish berparasit Photocornycus the females and so on.
a) secondary sexual nature are temporary, just show up at the time of spawning season only. For example, "ovipositor", fish Rhodeus amarus is a tool that is used to distribute the eggs to the bivalves, the kind of acne on his head during the spawning season. Many acne with typical arrangement in a particular species can be used to determine the sign of the species, eg fish and Semotilus atromaculatus Nocomis biguttatus males.
b) secondary sexual nature that is permanent or permanent, that this sign remains there before, during and after the spawning season. For example, black dots mark the male fish Amia calva, gonopodium in Gambusia affinis, clasper in group Elasmobranchia fish, color light on fish Lebistes, Beta and reef fish, fish in fish berparasit Photocornycus the females and so on.
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