This tank had several species of Cameroonian grasshopper displayed, none of which were identified to species level. However, the only ones I managed to see were three or four of this brown species.
Looking through iNaturalist, the closest match I can find are spur-throated grasshoppers of the genus Catantops, but I cannot find an exact species that resembles the one in the picture.
Just for reference, this picture has been rotated - the original picture shows the grasshopper upside-down on the roof of its tank.
