Apex domains cannot have CNAME records.
Question and response
Question
dig blueocean.ca. NS
Answer
blueocean.ca. 4 NS ns-1249.awsdns-28.org.
blueocean.ca. 4 NS ns-701.awsdns-23.net.
blueocean.ca. 4 NS ns-428.awsdns-53.com.
blueocean.ca. 4 NS ns-1825.awsdns-36.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0