How to change the shape of a Marker

How could i display a marker like this in my app (using react native): example

Currenty is looking like this: image

I want the marker to have that tail/arrow in the bottom.

this is the style that i’m using:

ballon: {
    height: 60,
    width: 60,
    borderRadius: 100,
    backgroundColor: '#2ec4b6',
    justifyContent: 'center',
    alignItems: 'center',
  imgInsideBallon: {
    height: 55,
    width: 55,
    borderRadius: 100,

Change the shape of the Marker.