Phaedimus
The fish amiae, which are another sort of tunnies, are so called, because they swim in shoals, as also the pelamydes or summer whitings. As for the rest that are seen to swim in shoals and to observe a mutual society, their number is not to be expressed. And therefore let us proceed to those that observe a kind of private and particular society one with another. Among which is the pinoteras of Chrysippus, upon which he has expended so much ink, that he gives it the precedency in all his books, both physical and ethical. For Chrysippus never knew the spongotera, for he would not have passed it over out of negligence.
The pinoteras is so called, from watching the fish called pina or the nacre, and in shape resembles a crab; and cohabiting with the nacre, he sits like a porter at his shellside, which he lets continually to stand wide open until he spies some small fishes gotten within it, such as they are wont to take for their food. Then entering the shell, he nips the flesh of the nacre, to give him notice to shut his shell; which being done, they feed together within the fortification upon the common prey.
