You Do Need power plug adapter while traveling from Cayman Islands to Senegal.

Here is Why You Need An Adapter

The outlet and plug type used in Senegal are C, D, E and K and in Cayman Islands are A and B. This is how they look like.

Cayman Islands

In Cayman Islands, outlets of type A and B are in use.

Type A

Type B

Senegal

In Senegal, outlets of type C, D, E and K are in use.

Type C

Type D

Type E

Type K