I am adjusting the stats on the sea lion from Tales From The Yawning Portal to build a lower CR sea lion cub and its pack tactics special trait got me wondering.
The trait reads (additional emphasis mine):
Pack Tactics. The sea lion has advantage on an attack roll against a creature if at least one of the sea lion's allies is within 5 feet of the creature and the ally isn't incapacitated.
To contrast, here is the sahuagin's blood frenzy special trait:
Blood Frenzy. The Sahuagin has advantage on melee attack rolls against any creature that doesn’t have all its hit points.
It seems more clear to me that the sahuagin's ability applies to multiple attacks.
Does this mean that the sea lion can only use this ability on one attack on each of its turns?
Does it also mean that pack tactics could only benefit an attack on the sea lion's turn or an opportunity attack but not both?