Clownfish Solves Puzzle

i put the fishes favorite food into a jar and cover the opening with nori (marine algae sheet) and use a rubber band to hold it in place. after over an hour of recording 5 minute segments, it was clear that the clownfish understood they had to get past the nori to get to their food. my other fish, the wrasses, did not seem to understand this and constantly tried to go through the sides of the jar to get their food. after the first 20 minutes the clownfish figured out they could push on the nori and pull it apart to get inside the jar. unfortunately for me, the nori was a lot stronger than i thought and it took awhile for it to soak and become soft enough for the fish to push a hole into it.
the blenny didnt care at all about what was in the jar, it was happy with the nori that was on the outside. also, the wrasses eat the nori too, but they wanted what was in the jar much more. the clownfish don't normally eat the nori, so it was impressive to see them bite and push on it.

the food in the jar is freeze dried mysis (it was floating in the jar, right under the nori), blood worms and cyclopeeze (both sank to the bottom and were what the fish wanted most.).
tank size is 65 gallons. fish species are: false percula (pair), exquisite wrasse (pair), solar wrasse, lawnmower blenny, royal gramma.

any questions i can answer in the comments! You could also visit http://www.ocreef.com for helpful information