You Do Need power plug adapter while traveling from Qatar to Canary Islands.

Here is Why You Need An Adapter

The outlet and plug type used in Canary Islands are C, E and F and in Qatar is G. This is how they look like.

Qatar

In Qatar, outlets of type G are in use.

Type G

Canary Islands

In Canary Islands, outlets of type C, E and F are in use.

Type C

Type E

Type F