Attending the shark, is seen that beautiful little fish, the _Gasterosteus ductor_, or _pilot-fish_; which first approaching the bait, returns as if to give notice, when, immediately after, the shark approaches and seizes it.[90] It is a curious circumstance that this elegant little fish is seen in attendance only upon the shark. After the shark is hooked, the pilot-fish still swim about, and for some time after he has been hauled on deck; they then swim very near the surface of the water, and at that time I have seen them taken by a basket from the chains of the ship. When the shark has been hooked and afterwards escapes, he generally returns, and renews the attack with increased ferocity, irritated perhaps by the wound he has received. On the 18th of March, 1831, during my former voyage, in lat. 44° 56′ north, and long. 25° 10′ west; in the evening, two sharks of a very large size were seen at a short distance from the ship. A high dorsal fin, projecting from the water, was at first only discernible, and had a resemblance to a rock.[91] It was at first stationary, but soon began to move steadily along, and then occasionally the tail could be seen partially above the water. I know not to what species to refer it; one of the crew on board, who had been in a whaler, said that it was what they named a “_bone shark_” which is seen in numbers alongside the ships when they are cutting up a whale. He said, also, that he had seen them as large as a _twenty-barrel whale_; that “the mouth resembled the gill of a fish, and they are spotted over the back.” Whether the latter part of this account accorded with the actual appearance of the fish, I was not sufficiently near to ascertain, but it appeared correct with respect to its large size. The natives of the Polynesian islands have such a dread of sharks as to worship some of them as gods; not from any respect or love towards them, but from fear. Ellis states, that, “although they would not only kill, but eat certain kinds of shark, the large blue sharks (_Squalus glaucus_) were deified by them; and, rather than attempt to destroy them, they would endeavour to propitiate their favour by prayers and offerings. Temples were erected, in which priests officiated, and offerings were presented to the deified monsters; while fishermen, and others who were much at sea, sought their favour. Many ludicrous legends were formerly in circulation among the people, relative to the regard paid by the sharks at sea to priests of their temples, whom they were always said to recognize, and never to injure. The principal motive, however, by which the people appear to have been influenced in their homage of these creatures, was the same that operated on their minds in reference to other acts of idolatry: it was the principle of fear, and a desire to avoid destruction in the event of being exposed to their anger at sea.”[92]