Claudius Aelianus [175-235 CE] (De natura animalium, 1.16): Among fishes the 'Blue-grey' is a model father. He maintains a strenuous watch over his mate's offspring, to ensure that they are not attacked or injured. And all the while that they are swimming the sea happily and without fear he never relaxes his vigilance, and sometimes brings up the rear and sometimes does not, but swims by them now on this side now on that. And if any of his young is afraid, he opens his mouth and takes the baby in. Later, when its fear has passed, he disgorges the one that took refuge exactly as he received it, and it resumes its swimming. - [Scholfield translation]