the directionâthey seemed to have an internal compass that just told them where to go.
âIâm hungry,â Danny said. And he turned and shot sideways toward a small pulsing cloud that was drifting through the water. Josh knew what it was immediately, but he wondered whether he should tell Danny. His brother had a habit of eating stuff while S.W.I.T.C.H.ed that freaked him out later when he S.W.I.T.C.H.ed back again.
But Danny was already swimming into the cloud of delicate white parachutes with see-through bodies pulsating through the water. Before Josh could say anything, he opened his mouth and slurped one in. It struggled briefly in his throat but could not escape. Josh knew this was because his brotherâs reptilian throat had backward-facing spines to prevent his lunch from swimming back up it again.
âWhat does it taste like?â he asked Danny as the living cloud scattered and swam away fast.
âUm . . . what? The . . . sea jelly?â Danny asked, after a gulp.
âYes . . . the âsea jelly,ââ Josh said, making air-quote movements with his flippers. âWhatâs it like?â
âWell . . . quite nice,â Danny said. He started to look a little sick. âI . . . just ate something icky, didnât I?â
âNot for a turtle,â Josh said. âItâs turtle takeout, that is. You ate a jellyfish.â
âEeeeurgh!â Danny said. âWhy did you let me do that?â
âWell . . . you said you were hungry!â Josh shrugged and laughed. âAnd thatâs what leatherback turtles eat. That reminds me,â he added as he and his brother swam on toward the shallows. âThere
is
something that can kill you here.â
âWhat?â Danny spun round, making a small vortex of sand and bits of floating seaweed. âA shark? A whale?â
âFar worse than that,â said Josh. âA plastic bag.â
Danny cuffed his brotherâs gray, white, and beige patterned head with one flipper. âYou really had me worried there!â
âWell, you
should
be worried if youâre going to swim around scarfing stuff without checking what it is first,â Josh said. âHundreds of leatherbacks die every year because theyâve mistaken a plastic bag for a jellyfish. Floating in the water they look really similar. The plastic bag blocks up their insides and stops other food from getting through. It makes them starve.â
Danny grimaced. âUm . . . that
was
actually a jellyfish I ate, wasnât it?â
âYesâit was,â confirmed Josh.
âPhew!â
They coasted over some rocks and stumps of old wood. And then Josh stopped. Very abruptly. He had not intended to stop. Something had stopped
him
.
And that something was not planning to ever let him go . . .
For a few seconds Danny didnât even notice. He swam on toward the beach, loving the way the sunlight dappled down through the warm waves and made ever-shifting patterns across the seabed. And he still hadnât even needed to take a breath! This was so amazing! He and Josh should just forget about giving the S.W.I.T.C.H. spray back to Petty and keep it all week. They could swim out in the sea every dayâmaybe even go offshore for miles and swim down to explore wrecks!
He started to say this to his brotherâand then he noticed that his brother wasnât next to him. Or behind him. Or anywhere.
âJosh? Josh? Where are you?â He waited, effortlessly treading water as his call traveled through the sea. At first he heard nothing . . .and then . . . a kind of squeak. He flipped round and swam straight for the source of the squeak. He still couldnât see Josh, though, and now his heart began to skip about, rather fast. What had happened? Had Josh S.W.I.T.C.H.ed back to a boy already? That could mean trouble.
Josh had not S.W.I.T.C.H.ed back, but he was still in trouble. He was trapped.
He hadnât