I have seen the Remora of a very large size. During a visit to the island of Tongatabu, one of the Friendly group, on August 1st, 1829, several were brought on board for sale, by the natives, which measured three feet and upwards in length. They had taken them with a hook and line. They were cooked, and found delicate and well-tasted. During also our passage through the straits of St. Bernardin to Manilla, several, of a large size, were seen swimming about the ship, but their movements were slow and heavy. The most usual size taken from the body of a shark, is from six to twelve inches. The Indian Remora is said to be found of the length of two or three feet; and even, according to a description quoted by Dr. Bloch, to extend to seven feet. The usual number of divisions on its shield is from twenty-two to twenty-four. The power of adhesion is retained for a long time, by this fish, after decapitation. I detached one of them from the body of a shark, decapitated it, and then applying the sucking-plate to a smooth surface, found the power of adhesion remained, and it continued for the space of nearly twenty minutes. The body of the animal, after the removal of the head, displayed much muscular irritability on being touched, and the pectoral and ventral fins moved for a long time afterwards. The pilot-fish, as I have before observed, (_Gasterosteus ductor_,) is usually seen in company with the shark, and with no other voracious fish; it is of a beautiful azure colour, girded around the body by broad bands of a very dark blue. I have seldom seen them larger than a foot in length, but in breadth some exceed others. They have never been taken when in company with the shark, but, on the capture of that voracious animal, they hover about him as long as he remains in the water; and a very short time after he has been hauled on board, they can sometimes be taken by a basket from the chains, as they swim at that time very superficially, and sometimes have been known (but rarely) to take bait. On the 18th, in latitude 2° 20′ north, and longitude 25° 26′ west, we got the north-east trade, far to the northward, being north-north-east, moderate and fresh breezes,[93] and on the 7th of April, we lost the north-east trade in about 30° 31′ north, and longitude 44° 20′ west.