Mackerel scad are schooling fish, the kind that make ‘bait balls’ which end up being decimated by large predators. They’re members of the jack family, not that this does them much good. Some of those large predators are other members of the jack family such as greater amberjacks and almaco jacks.
I came across this school not far from shore. There were probably two or three hundred fish in the school and it was fun watching them twirl and circle in harmony. They encircled me, went past and I popped out the other side. It was then I noticed they weren’t alone. One the other side of the school, a medium-sized great barracuda cruised around.
The barracuda came toward me to take a look, but I was clearly less interesting than the scad and it moved away again. The barracuda can be seen in the bottom photo. See if you can spot it.
Graham's Island 
Hmm, I imagined barracuda here and there but probably didn’t spot it! 😊
LikeLiked by 1 person
It’s there, honest.
LikeLiked by 1 person
Unusual to see fish photographed from above as in the first photo. I’m not sure I spotted the barracuda in the last photo though!
LikeLiked by 1 person
As a snorkeler I photograph a lot of fish from above. In this case I like how they look against the sand and coral below. The barracuda is on the left, about halfway up the image. It does blend in rather well.
LikeLiked by 1 person
Yes they do look good against the sand. Okay thanks, I might have pinpointed the barracuda!
LikeLiked by 1 person