0:00:00 > 0:00:00- 888
0:00:02 > 0:00:05- # There's plenty of adventure - in the sea
0:00:05 > 0:00:07- # Oli and Beth, friends are we
0:00:07 > 0:00:10- # Playing in the sea, - lessons one, two and three
0:00:10 > 0:00:14- # Swimming around, - fun for you and me
0:00:15 > 0:00:17- # Oli Dan y Don
0:00:18 > 0:00:20- # Oli Dan y Don
0:00:20 > 0:00:23- # Searching in the sea, - it's so exciting as you can see
0:00:24 > 0:00:26- # Under the sea, under the sea #
0:00:30 > 0:00:33- THE RED TIDE
0:00:55 > 0:00:57- You're too slow.
0:01:00 > 0:01:03- OK, Morfudd. Ready for you.
0:01:03 > 0:01:05- That's easy. Here I come.
0:01:17 > 0:01:19- Amazing.
0:01:19 > 0:01:21- Amazing.- - That's your highest jump ever.
0:01:21 > 0:01:24- I could do that in my sleep.
0:01:24 > 0:01:27- It's my turn now. Raise it higher.
0:01:28 > 0:01:29- Higher.
0:01:29 > 0:01:31- It won't go any higher.
0:01:32 > 0:01:34- OK, here I come.
0:01:37 > 0:01:38- That's not fair.
0:01:46 > 0:01:48- Beat that, Morfudd.
0:01:48 > 0:01:51- I can't fly - but I like playing catch.
0:01:51 > 0:01:53- You're it.
0:01:53 > 0:01:55- You can't go underwater.
0:01:56 > 0:01:57- Over here.
0:01:57 > 0:01:59- Here I come, Oli.
0:02:00 > 0:02:02- No, you don't.
0:02:06 > 0:02:08- You wait, Oli.
0:02:09 > 0:02:10- Oli!
0:02:11 > 0:02:13- That's not fair.
0:02:14 > 0:02:16- It's easy to escape from you.
0:02:17 > 0:02:18- We can go underwater.
0:02:19 > 0:02:23- OK, carry on playing underwater - without me.
0:02:25 > 0:02:27- We're sorry.
0:02:27 > 0:02:30- We promise not to go - underwater again.
0:02:30 > 0:02:32- Don't leave.
0:02:33 > 0:02:35- Well, OK then.
0:02:35 > 0:02:37- BEEPING
0:02:38 > 0:02:40- Beth, Oli, are you there?
0:02:40 > 0:02:42- Yes, Dyf.
0:02:42 > 0:02:45- There are some very sick fish - near the docks.
0:02:46 > 0:02:48- Should we check it out?
0:02:48 > 0:02:50- Should we check it out?- - Yes, please.
0:02:50 > 0:02:52- We're on our way.
0:02:53 > 0:02:55- I'll come with you.
0:02:55 > 0:02:56- Can I help, too?
0:02:57 > 0:03:01- Sorry, but this is - an underwater examination.
0:03:01 > 0:03:04- Everything exciting - happens underwater.
0:03:05 > 0:03:07- Down we go.
0:03:07 > 0:03:09- Oli underwater.
0:03:14 > 0:03:16- That's not fair.
0:03:21 > 0:03:24- Come on, this is where - we should find the sick fish.
0:03:30 > 0:03:32- I'll take a sample of the water.
0:03:32 > 0:03:35- I'll take a sample from the surface.
0:03:38 > 0:03:43- Beth, I don't feel very well.
0:03:43 > 0:03:45- Don't you?
0:03:45 > 0:03:48- No. I think I'll go home.
0:03:48 > 0:03:50- I'll see you later.
0:03:52 > 0:03:55- Everything happens underwater.
0:03:55 > 0:03:57- Nothing happens up here.
0:03:58 > 0:03:59- Hey, what's that?
0:04:00 > 0:04:04- It looks odd to me. I haven't seen - anything like it before.
0:04:05 > 0:04:07- I'll tell Oli and Beth.
0:04:23 > 0:04:25- Oli.
0:04:25 > 0:04:26- What's wrong?
0:04:26 > 0:04:29- A large part of the sea - has turned red.
0:04:29 > 0:04:33- It's a horrible red substance. - I've never seen it before.
0:04:34 > 0:04:35- We'll need a sample.
0:04:36 > 0:04:39- You can show Beth and me - where it is.
0:04:42 > 0:04:44- What do you think it is?
0:04:44 > 0:04:48- A red tide. - It's an algae that grows in the sea.
0:04:48 > 0:04:49- Is it harmful?
0:04:50 > 0:04:53- Yes. Algae reduces - the oxygen in the water.
0:04:53 > 0:04:56- That's bad - for the creatures of the sea...
0:04:56 > 0:04:59- ..including seals.
0:05:03 > 0:05:07- It's dangerous. - I'm not sure how to get rid of it.
0:05:07 > 0:05:11- Morfudd went under the tide - on her way to the harbour.
0:05:11 > 0:05:13- She felt ill and went home.
0:05:13 > 0:05:17- What are we going to do - if she hasn't reached home?
0:05:18 > 0:05:22- Go back and keep the creatures away. - I'll have a closer look at this.
0:05:23 > 0:05:24- OK, sir.
0:05:24 > 0:05:26- OK, sir.- - Off we go!
0:05:29 > 0:05:30- Can you see her?
0:05:30 > 0:05:31- Not yet.
0:05:31 > 0:05:34- Not yet.- - We must find her
0:05:34 > 0:05:35- We will.
0:05:35 > 0:05:39- Morfudd is over by the great rock.
0:05:41 > 0:05:43- SHE COUGHS
0:05:44 > 0:05:46- She's in trouble.
0:05:46 > 0:05:48- We're on our way.
0:05:56 > 0:05:58- Morfudd.
0:05:58 > 0:05:59- She's not well, Oli.
0:05:59 > 0:06:01- She's not well, Oli.- - Are you OK?
0:06:01 > 0:06:05- I can't... breathe.
0:06:05 > 0:06:09- You have to get away from this - red algae. Can you reach the shore?
0:06:13 > 0:06:17- You can't stay here. - The red algae will make you ill.
0:06:18 > 0:06:21- Awen, you'll have to fly her - out of here.
0:06:22 > 0:06:24- What? Fly her?
0:06:24 > 0:06:26- Well, uh...
0:06:26 > 0:06:30- Carry her between your floats. - You'll need a sling.
0:06:30 > 0:06:34- Seaweed. We can use seaweed.
0:06:34 > 0:06:36- Perfect.
0:06:36 > 0:06:38- Perfect.- - Down we go.
0:06:45 > 0:06:46- Which way?
0:06:46 > 0:06:49- Which way?- - This way. The seaweed is this way.
0:07:07 > 0:07:09- This is good seaweed.
0:07:09 > 0:07:11- I've got some.
0:07:12 > 0:07:14- Great.
0:07:14 > 0:07:16- Come on, Oli.
0:07:18 > 0:07:22- Oli and Beth - have gone to get seaweed.
0:07:22 > 0:07:25- I'd love to go with them to help.
0:07:26 > 0:07:28- Don't. Stay with me.
0:07:31 > 0:07:33- We've got some.
0:07:37 > 0:07:39- Hold on tight. They're almost done.
0:07:40 > 0:07:42- We'll have you away in no time.
0:07:43 > 0:07:45- Thanks, Awen.
0:07:48 > 0:07:50- OK, Morfudd, we're ready.
0:07:51 > 0:07:53- Let go and slide.
0:07:54 > 0:07:56- Well done.
0:07:56 > 0:07:58- Slowly does it, Awen.
0:07:59 > 0:08:01- It works.
0:08:08 > 0:08:10- How do you feel?
0:08:11 > 0:08:15- Much better. - There's plenty of fresh air.
0:08:15 > 0:08:17- I can breathe again.
0:08:17 > 0:08:19- Look at that.
0:08:19 > 0:08:21- You can see everything up here.
0:08:22 > 0:08:23- Do you like it?
0:08:23 > 0:08:25- Do you like it?- - Yes.
0:08:25 > 0:08:28- You're so lucky - flying so high like this.
0:08:28 > 0:08:29- Look.
0:08:29 > 0:08:32- There's a gap in the red algae.
0:08:32 > 0:08:34- Oli and Beth made it.
0:08:35 > 0:08:37- Their propellers are breaking it up.
0:08:38 > 0:08:40- Yes.
0:08:40 > 0:08:42- If their propellers can do that...
0:08:42 > 0:08:45- ..think what I can do - with my propeller.
0:08:51 > 0:08:54- Go, go, go. Whoo-hoo!
0:09:00 > 0:09:04- Incredible. The red algae - is starting to disappear.
0:09:05 > 0:09:07- No more sickness here.
0:09:08 > 0:09:10- Whoo-hoo.
0:09:10 > 0:09:12- Yeah.
0:09:17 > 0:09:19- That was amazing.
0:09:19 > 0:09:24- You're real heroes. - The best trio in the world.
0:09:27 > 0:09:28- BEEPING
0:09:28 > 0:09:30- Oli, Beth?
0:09:30 > 0:09:32- We're here.
0:09:32 > 0:09:35- The red algae has disappeared.
0:09:35 > 0:09:37- The water quality is improving.
0:09:39 > 0:09:42- Bring me a sample of the water.
0:09:43 > 0:09:45- OK, sir.
0:09:45 > 0:09:48- Well done, you two, and you, Awen.
0:09:50 > 0:09:52- Let's collect the samples.
0:09:53 > 0:09:56- After you.
0:09:56 > 0:10:00- That was great, Awen. Thanks.
0:10:00 > 0:10:02- It was my pleasure.
0:10:02 > 0:10:06- The best part - was the trip in the air.
0:10:06 > 0:10:09- Glad you enjoyed. - Do you want another trip?
0:10:10 > 0:10:12- Really? Yes, I do.
0:10:12 > 0:10:14- Come with me.
0:10:14 > 0:10:16- Let's go, little bird.
0:10:19 > 0:10:22- Whoo-hee! I love flying.
0:10:23 > 0:10:25- Wait until you see this. - Hold on tight.
0:10:30 > 0:10:32- Cool.
0:10:36 > 0:10:41- I'd love to be able to fly like you. - It's fantastic.
0:10:41 > 0:10:43- Yes, it is.
0:10:43 > 0:10:46- I'd like to swim underwater - like you.
0:10:47 > 0:10:49- That's quite cool, too.
0:10:50 > 0:10:52- Both of are fantastic.
0:10:52 > 0:10:54- I agree.
0:11:22 > 0:11:22- .