Clinging to the shark 

(or sometimes to submarine, buoy, seaturtle)

is a sucker shark,

attached to which

and feeding off its crumbs

is one still tinier,

inch or two,

and on top of that one

one the size of a nick of gauze;

smaller and smaller

(moron, idiot, imbecile, nincompoop)

until on top of that

is the last, a micro-dot sucker shark

a filament's tip sliced off, a mote

with a heartbeat, and the great sea

all around feeding

his host and thus him.

He's too small

to be eaten himself

(but by accident: some things swim

with open mouths)

so he just rides along in the blue current,

the invisible tip of the pyramid,

the top beneath all else.