296
OF FISHES
'
A remétrkableimtaëè of partnership for mutual
_
onéänaÿ-call itebinme‘nsalismor symbiosis as one likes, isî
that existing between the Pilot sh (Naucrates) and Îa]
Shark.
It seems well-established from many obServations
_
that the small sh, usually in pairs, lead the big "sh about… '
They probably have sharper eyes for large booty than the
1
Shark and then obtain their reward in the crumbs that fall“
from the latter’s mouth.
If the Shark is caught
'Ï;
‘
boat, the Pilot then follows the boat even for some days
until it nds another partner.
Echeneis, the sh With a
sucker on its head, Which may have developed from the. '
_
Pilot sh, has given up leading the Shark and become a l
f :::‘semi—parasite (Pl. XIIIÔÏ); It
to obtain its
'
FÎG. 7
Ceràtias parasitic on
female
(From Sæmundssbn.) '
_.
_…__.
,
_*
«
' _
easily—in
but1t 1sobv1ouslynolgngæ
j
f nyut thShk 1œuf1nn nwy
,
-
Howthc=
lgfm1Ctbutwthitaî‘nùmber
'
fryo:£îtëï;wkld(Fg7s)whh min—ate thatgthey, >
seem like loosep1eeesohskm ÏOnï doser eXarh‘ii1ation
'
—;
Régan (r925)
these pigmies
the
ï
',-niàles,, and
,_ that the _samç_phenomenon_oècurs in
'
of
The. connectiañ
that. of an
The's‘nputland
chin_iofie tiny male are prodüjééäÿforward into
_