Green Thumbs - Mammillaria Fish Hook Cactus.

Mammillaria dioica Fish Hook Cactus – Neel's Nursery

Mammillaria tetrancistra (Common Fishhook Cactus) - World of Succulents

Why is my cactus growing smaller cacti on its side? - Quora

Fishhook Pincushion Cactus Flowering Outdoors AZ Stock Image - Image of spiny, spines: 67238179

Mammillaria dioica Fish Hook Cactus – Neel's Nursery

Pincushion cactus Care (Watering, Fertilize, Pruning, Propagation) - PictureThis

Fish-Hook Cactus, Mammillaria dioica

Escobaria emskoetteriana (Junior tom thumb cactus)

Fishhook Cactus A plant by @MissJodles on Greg