Sounds like a Malaysian Trumpet Snail, off the top of my head.

siamese algae eaters, anamo shrimp, midget sucker mouth catfish, american flagfish,malaysian trumpet snail, ramshorn snail, zebra snail, britlenose pleco, whiptail catfish, black molly, suckermouth catfish

the largest snail in the world which is a African giant snail weighs exactly 2 lbs

The Australian Trumpet Syrinx aruanus is the largest living marine snail, weighing up to 18kg or 40 pounds.

Most snails lay eggs, but some are live-bearing snails, such as the Malaysian Trumpet Snail. Most snail species are hermaphroditic, meaning they have both male and female reproductive organs. However, apple snails are one of the few exceptions to this rule. Snails typically reproduce sexually, although some species have been known to reproduce asexually.