Varieties include:
Thompson: Yellow skin with pink-red flesh.
Wheeny: Thin green/yellow skin with many seeds and a strong lemon-like flavour.
Marsh seedless: Has a pale yellow skin at maturity, pale yellow juicy flesh, mild flavour and very few if any seeds. 
Ruby or Red Blush: Pink-red flesh with a smooth skin that has a distinct pink blush.

Selection:
Choose heavy fruit, lighter fruit can have thick skin and minimal flesh and juice. Small blemishes on skin do not reduce quality of fruit.

Storage:
Under refrigeration.

Serving suggestion:
Avocado, pink grapefruit and paw-paw tossed with warmed honey and lime juice.