Agroup behavior that is much more common in bony fish than cartilaginous fish is

A group behavior that is much more common in bony fish than cartilaginous fish is schooling.
 The term schoolong describes group behavior in fishes , example: if the group is swimming in the same direction in a coordinated manner, they are schooling.
Fish schools are examples of aggregation in animals.

Smelly rocks sink in water haha!