Etebo was in action for 90 minutes, an created an assist for Las Palmas's first goal which was scored by Erik Exposito in the 53rd minute.
The midfielder who recently moved to the Spanish outfit on loan, put in an impressive performance but was unable to prevent Las Palmas from conceding two goals.
Etebo posted a message on his Official Instagram account which said, "Pleased to get an assist last night but disappointed with the result. We will march on to the weekend. #EK6"
Celta Vigo equalised through Jonny in the 62nd minute, and sealed the result with when PabloHernandez scored the winning goal in the 89th minute.
Etebo had earlier said he did not come to Las Palmas to sit on the bench, and has backed up his statement with impressive performances.
The 22-year-old revealed his happiness as Las Palmas drew their last La Liga match against Barcelona.
However, he could do nothing to prevent the defeat to Celta Vigo, which leaves the Canary Islanders in 18th place and in the relegation zone.
Etebo who has now been joined at Las Palmas by compatriots: Emmanuel Emenike and Ezekiel Imoh will hope to get a better result when they travel to Villarreal for their next game on Sunday, March 11.