He is a small baby and is swimming round with his bum in the 'air', i know that they have sacs in their tails that pass air through while underwater. He is happy, and feeding ok and swimming around but i haven't come across this before, can anyone help please.

I have an adult & he does this sometimes. If it is a regular problem you need to review the diet. Possibly needs more veg & less protein also feed in smaller amounts.

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I care for:

1.0.0 Red Eared Slider (Trachemys scripta elegans)- 10/11 yrs old

0.0.2 Leopard-Spotted Catfish (Synodontis eupterus) -5/6 yrs old

0.0.1 Red Tailed Shark (Epalzeorhynchus bicolor) - 7 yrs old

2.1.0 Moggies - various ages

"The greatness of a nation and its moral progress can be measured
by the way in which its animals are treated."
- Mahatma Ghandi