Extremely active RCS

[Tacocat]

Hi there, I have a 5 gallon tank with a betta, 4 rasboras, and a cardinal tetra(yes ik not greatest stocking but right now there's not much I can do about it (parents etc.)) Anyway, I also have 3 assassin snails, 2 red cherries and 3 tiger shrimp. At the moment,t one of the RCS are hiding because it just molted. However, the other one is being extremely active and is flying around the tank. It has a sort of mucousy film over it. I'm pretty sure it's about to molt, but I'm not entirely sure. It sort of looks like a mating swim, but the mucousy stuff and the fact it's been at it for hours straight says otherwise. I'm curious as to what it is and if it might be harmful. I will test for tank params later.

 

[Tacocat]

Bit of an update, the affected shrimp is now less active and acting normal, and I noticed a fresh molt. However, the shrimp still has the same moldy glossy look.

 

[Slaphppy7]

I don't see the "moldy glossy" in these pics...looks like a saddled female, to me

 

[Bruce Leyland-Jones]

Bit of an update, the affected shrimp is now less active and acting normal, and I noticed a fresh molt. However, the shrimp still has the same moldy glossy look.

Prior to moulting, shrimp often perform a series of exercises, to flex the outer carapace and to try and separate the old skin from the new. Halfway through the moulting process, the shrimp acquires a sort of milky appearance. Usually, moulting takes place out of sight...somewhere secure for the shrimp, because it is vulnerable when freshly moulted.
However, I do hear tell that if a shrimp cannot shed its coat, it'll perform some relatively frantic exercises to shed the old.

 

[Tacocat]

I don't see the "moldy glossy" in these pics...looks like a saddled female, to me

If you look closely, you'll see a bit of clear stuff surrounding the shrimp, particularly around the mandibles in picture 2