Source:
https://scmp.com/article/684321/wheres-fire

Where's the fire?

Dragon fruit is dramatic and beautiful. The thick but tender skin - most commonly bright pink (but it can also be purple or yellow) has smooth, large 'scales', which give a clear indication of how the fruit got its name. The juicy flesh, which is dotted with edible black seeds, ranges from white to deep pink.

It's a pity that the flavour doesn't live up to its enticing appearance. The texture is similar to that of a kiwifruit but the flavour is blander. The most common type found in Hong Kong has fuchsia-coloured skin and white flesh but those with pink flesh are sweeter. Buy fruit that is heavy and firm with unshrivelled skin and soft, pliable, green tips on the scales. The fruit is popular during summer because the flesh quenches thirst and cools the body.