The "Gills are the internal" flaky stack of pink / reddish membranes you can see when fish breathes and opens their operculums. Normally they will keep them as closed as possible.
If you are looking a the small red spot just on the edge of his operculums, it has great chance of being coloration and is a sign that all is well and your little guy is gaining more colors.
Gills are under this plate and are a lot more "delicate looking".
Maintain close observation on "it". try to see "under the plates" as he moves around. if any sign of erosion appears., swelling or comportment changes.
My betta has a tendency to grow back blue scales where he scratches himself, yours may be growing blue and red. The edge of the gill plates are a good place to get bender fenders.
Other point to keep in check are the area around their mouth and their forehead. They are pokers when hunting in nature and scratches and lumps are part of daily activities.
If you are looking a the small red spot just on the edge of his operculums, it has great chance of being coloration and is a sign that all is well and your little guy is gaining more colors.
Gills are under this plate and are a lot more "delicate looking".
Maintain close observation on "it". try to see "under the plates" as he moves around. if any sign of erosion appears., swelling or comportment changes.
My betta has a tendency to grow back blue scales where he scratches himself, yours may be growing blue and red. The edge of the gill plates are a good place to get bender fenders.
Other point to keep in check are the area around their mouth and their forehead. They are pokers when hunting in nature and scratches and lumps are part of daily activities.