The California corbina usually has only one weak spine at the front of the anal fin, while the yellowfin croaker has two strong spines.

The femora are at front with, at most, weak spines.

They have two dorsal fins, the first consisting of weak spines and the second of a single spine followed by a number of soft rays.

Not to support a weak spine as some aliens assume, but because we're a warrior race and we evolved these ridges as a defense against predators.

The boy went off with a curious, shambling gait which told my surgical eyes that he was suffering from a weak spine.

There are two separate dorsal fins, the first containing eight weak spines while the second consists of a single spine followed by 23 to 26 soft rays.

The dorsal fin is very long, containing a few weak spines at the front followed by 116-123 soft rays.

The head drooped continually to one side or the other, as though the weak spine could not bear the weight of it.

Furthermore, the abdominal tergites have weaker spines.

The first two leg pairs are enlarged with weak ventral spines.