indentify

I know someone who’s buying a tank for a lizard and it’s currently being used as a fish tank so they asked if I could take this guy/girl. I’m not sure what they are tho so If anyone could help me out so I would know if I have a tank that will suit them. Thanks ?

Sorry for the awful picture but its VERY small. Ive noticed a couple now since adding more live plants to my tank (my bad for not cleaning them well enough). What kind of snail is this and is it considered a pest? Id hate to end the life of an innocent snail but I dont want them to end the life...

Heya, this is my first post so not sure if I’ve done it right! I was just wondering if anyone could identify the fish in the picture (I know it’s not great but he/she is speedy!) I’ve had it for about 2 years and it’s roughly tripled in size to around 3 inches thanks :)

Hi can someone help me identify the type Or species of this fish please. I would really appreciate it. Thanks https://db.tt/oktcjeUa https://db.tt/oiRrQkF5