I went diving a while back on the wrecks just outside P. Calero. Swam through the hull of the sunken boat and came out the other side to see 8 stingrays all lined up on the sea bed.
Biggest was about 1.5m across.
When we got close, some of the smaller ones went and sat on top of the big one...must have been their mum!
Very docile...you can get pretty close to them if you go slowly.

Urchins are everywhere....and hurt too!
Have to be careful about stepping on the little sharks here and there as well.