Trochus lifespan in our aquariums?

[A_Blind_Reefer]

A couple months ago I lost a trochus snail. I figured that he’s been with me for maybe six years and figured old age. Last night a Trochus was at the rim of the aquarium, spraying liquid out all over the floor. The cats were not impressed. I figured it was a spawning event. This morning, someone pointed out that a snail was upside down. It was in the location of the sprayer the night before, just at the bottom as opposed to the rim. I got all these trochus about six years ago, ten total. They are ginormous, about the size of a cupcake. The back of my head is thinking that something must be wrong, while the front accepts this as old age. I’m curious as to the general consensus is as far as lifespan in an aquarium? Everything I find says up to fifteen years, but I’m thinking that’s not the norm in captivity. I have an order of fish coming in the next week or so and m thinking that I should add Trochus to replenish these guys if they’re going to kick off one by one now.

 

[shakacuz]

1-2 years. maybe less, maybe more. it's a bit difficult to tell or keep track unless you have some that spawn in your tank and can then assume age from then forward(of the new spawn).

 

[A_Blind_Reefer]

1-2 years. maybe less, maybe more. it's a bit difficult to tell or keep track unless you have some that spawn in your tank and can then assume age from then forward(of the new spawn).

Yeah, six years doesn’t sound too bad then. Weird that everything on trusty ol google says 15 years. Pretty sure that’s in the wild.