New vacation founds, can these invertebrates be kept in my aquarium?

HI everyone! Hope you're doing well.
So this year me & my family are staying to the same turistic village, and yesterday on our way there we stopped to eat lunch at a restaurant by a lake. I had to go and see if were are any living things or plants in the lake. I found three giant snails that look exactly like pond snails, only bigger, one of them died and two have survived and are doing well from what I can't tell, I'm changing their water daily from a clean pond nearby. Another thing I found that I really liked, was a big freshwater clam, which I never thought I'd find here, however it looks very similiar to this one, only that it's not that dark in colour and it's more yellowish.



So I want to know if I can bring these guys home? Will they do any harm to my aquarium? If the clam likes to dig, is there any problem with putting it in my dirted tank, I mean will anything bad happen to it if it reaches the soil. The substrate of the lake that I got them from was like a muddy looking sand.
The lake is protected by law so no toxins are disposed whatsoever.
The name of the snail seems to be "Lymnaea Stagnalis" or commonly Great Pond Snail, from my research, but I couldn't find ANY feedback on google about keeping them in a home aquarium . Will they eat live plants?
Any advice would be highly appreciated, thanks!

 

The only thing I would worry about is the introduction of diseases or parasites. Fish that live in tanks have weakened immune systems since there aren't really to many diseases in the tank but wild animals have much better immune systems. However if the other fish in the tank were caught from the same lake it would be fi.e

 

The only thing I would worry about is the introduction of diseases or parasites. Fish that live in tanks have weakened immune systems since there aren't really to many diseases in the tank but wild animals have much better immune systems. However if the other fish in the tank were caught from the same lake it would be fi.e

Noo, the fish were bought from the store :/... Can I put the inverts in a quarantine tank for a certain amount a time, for what signs of disease should I look out? I thought I was free to go since they looked fine, I didn't know about the possible diseases they could transmit :/.
Also, I wanted to know, are the snails the big version of the ordinary pond snails? I'm already fed up of taking getting rid of the normal pond snails in my tank, I'm not looking for huge versions of these pests.

 

I don't know much about snails.
The whole disease thing I really wouldn't put them in there just because they can carry the disease but they are immune to it. I wouldn't do it. But they may not carry the disease.

What you could do is quarantine them for a month and than put a fish in there with them if the fish is fish after a month I would say your good. But it is your call

 

I'd advise not to add the clam for two reasons: Clam larvae are free floatings and will attach to anything and have been known to attach to the gills of the fish which could cause death. Another reason not to add clams is that when they die, which you would not know about since they do bury themselves will pollute the water with their rotting body.

@Snails, if you think pond snails are a pest, do you really want to risk putting a snail in your tank that you have no clue in terms of their reproductive cycle? The only snail I would put in my tank are assassins ;-)

 

I'd definitely quarantine them, They just looked healthy to me. Luckily I have an empty 10 gallon in my house.
@AmazonPassion, I thought the clam was the thing I should worry the least about, I've seen several auctions on ebay/aquabid that sell them and a couple were raised in ponds as well, that's why I thought it wouldn't be a big deal. Is there any way I can scrap them off or something?...
About the snails, I was wondering if they had the same "behaviour" of the ordinary pond snails, plus I never had any of the "big" snails, such as apple snails, etc. Because they're not being sold at my country.
Bwah I was really excited about these two :/.

 

Well, I'm not a fan of pond snails at all....and I would just be worried about this snail population exploding in my tank.

There is always a possibility of clam larvae lodging in the gills of the fish and I don't think you can scraped them off though.

I have kept clams in my tank when I was kid, and thought about doing so as an adult until I did further research on them. For me, the possibility of it happening was to great of risk. It might not happen after all though, who's to say.