Smallest Dimensions For Adult Ray

all the adult motoro that ive seen and owned just grow to 40-45cm disc size. i think you can get away with a 2-2.5ft wide tank with that. females are much much bigger.

if you have the opportunity for a wider tank - the better for the rays.

First thing to remember is that a ray yes might get a disk that is about 17-18inches across and usually their disk is that long as well. But off that they have a large long tail. So if you have a ray that is said size plus a tail that is another 10-12 inches long you have a fish that has a length of about 27 inches. Now if you have a tank in which the ray is going to constantly have its tail smashed against the wall it can lead to probems. Infections and all sorts of fun as it will rub it's tail raw. And then this can lead to fish biting it thinking it's food and a mess of problems that can lead to death. Picking the proper size tank for adults is very important. But with that in mind not all species get really big. Some stay smaller and the male sex usually stays smaller as well. So think of the space your willing to give up vs what rays you might or would like to keep now and in the future. Allot of good research out there with people going over sizes. Read as much as you can and see what other ray owners use to house said rays. I always figure if you own any sort of variety or play with any of the larger species especially motoro you better be prepared for the possibility of having a 24inch disk ray.

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72x30" will do a hystrix for a long time depending what size you get it at

I think 30" wide is a good start point for most rays as long as you totally understand you WILL need to upgrade

Most people ask the smallest tank size think it will be ok for years not taking into account how fast rays grow


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minimum 72"x36" for your average black ray or motoro. you can cheat and go a bit smaller for the histrix, scobina, retic and i believe Orbignyi also remain on the smaller side but information is limited on that species. This is my opinion.