Searching The DEEP For The Biggest Fish In The Ocean (*CRAZY ENCOUNTER*)

In this video we are going looking for the biggest bony fish in the ocean, the Muller. Now these ocean giants can reach weights of up to 5,000 pounds and be over three meters long, but they love to sit in really deep and really cold water, so we have got to go down there. Guys the things I do for these videos eh, I'm absolutely knackered, it's about 4.30 in the morning, just picked up some tanks and we're gonna head now to a really cool spot on the other end of the island that hopefully will have a ton of Mullers out at this time of the morning, so yeah let's do it. We're down, let's go find some Mullers. Guys the reefs looking awesome today, super slack, look at all these fish up with the water feeding. This is a spot where these big Mullers come to be cleaned, so if we find one, or 10 hopefully, we'll probably find that there's a big school of longfin bannerfish around them, picking off parasites from their tough skin. This is where we're going to start looking for the Muller, out in the blue here, this is where they come in to be cleaned on the reef here. Now there's a few longfin bannerfish out in the blue, but it is a little bit warm today, so I'm hoping that's not going to put them off. There's a bit of current now that's preventing us from swimming much further, but we're going to see if we can swim into it, let's go. Still looking out into the blue, but nothing yet. Whoa, bluefin trevally, three of them, four, four. Guys there's no Mullers just here, so we're going to swim a bit further and see if we can find any around the corner. It also feels like it's a little bit cold around here as well, which is a good sign. I don't know whether you can see it, but there's loads of longfin bannerfish swimming around in the blue. They're obviously waiting very patiently, so fingers crossed one of these big Mullers might come in soon. I've got a video to make, I can't be waiting this long. Look at all these fish, they're everywhere. They're all getting pushed to the surface though, because there's a load of water coming up the slope. Diving here is great, but the conditions can be absolutely crazy. Let's hope we don't get too crazy today. So far it really was not worth waking up at 4 30 for this. Come on, whoa, turtle. There's a big green turtle just come out of the blue. Let's see if he comes close. We can tell this one's a green turtle and not a hawksbill, because he's got a single pair of scutes in between his eyes. Guys, we're going to have to head back to the surface soon. It's not looking good, that's for sure. Now, whilst this area is famous for being a hot spot for the Muller, there are also plenty of other fascinating creatures that call this reef home. As we headed shallower, we came across this big school of big eye barracuda that were illuminated by the early morning sun. Despite being small, these barracuda are fearsome predators. I don't know what this turtle's doing. He's sort of rubbing his belly on the sand. Maybe he's trying to get rid of something. That is weird. What are you doing, mate? I hope he's not got his arm stuck. No, definitely not stuck. Just being a bit weird, it seems. I'll get an ID for the database, because this one's a hawksbill, so he might well have a name. And there's a little moray here as well, look. Right, we'll leave him to it. Goodbye. Oh, look at this little puffer. I'm not exactly sure what species this is, but I'll flush it up on the screen now. He's just digging around in the sand looking for a meal. Probably a crab or something. As you can see, they're perfectly adapted for blending into the sand. He's even got tons of sand on him for some reason. Guys, it's so nice down here this morning. It's actually pretty warm, which is good for me, but not good for spotting big fish, that's for sure. There's some more of these barracuda just here. Let's see if we can sneak up on them. Whoa, check this out. Snake eel. This fantastic serpent-like creature is a banded snake eel. These snake eels are master mimics and closely resemble the highly venomous banded sea krait, both in appearance and the way that they swim through the water. Now, unlike the sea kraits, these snake eels aren't venomous and only really pose a threat if you're a small crustacean or mollusk buried under the sand as they pass by. Given these guys are nocturnal, it was a real treat to see this one out hunting. See you later, mate. Enjoy your breakfast. Look at this guy digging around in the sand. This is a goatfish. It was a goatfish, because he's now swimming away from me. If you look closely, you can see he's got two little barbules at the front of his mouth that he uses for rooting around in the sand. There you go, now you can see them. If you're a little critter buried under the sand, that guy there is not good news, that's for sure. Wow, guys, look at this sea krait. This is a banded sea krait. They are highly, highly venomous. Let's see if he'll come out and say hello. Now, this is actually the species of sea krait that that snake eel we saw before is imitating. So you can see they have the same black and white stripe color, so that snake eel is pretending that he's one of these guys. And here he goes. I'm not gonna lie, that was a little bit scary, but we're still alive, so that's So I will see you back underwater for mollusc dive number three. Let's do it. It's about three o'clock in the afternoon. The water is very chilly today, so fingers crossed, there's gonna be some molluscs. Down this way, let's go. It is looking spooky down there today. This fish here is the longfin bannerfish. You can see their long dorsal spine. And this is the fish that cleans the mollusc, so this is a really good sign. Oh yeah, it's getting really cold now. Yeah, still not that cold. Let's hope for 18 degrees. Right, we're currently down at about 22 meters, but we're gonna head a bit deeper, because I think the molluscs are going to be very deep today. Oh, the sun's come out. How lovely. Look at this big rock-jumping parrotfish. See if we can see his gnashers. Whoa, look at the size of that. I bet he's got a big dental bill. There's hundreds of them. That's awesome. Oh, mollusc, mollusc, mollusc. I see one. Ryan, Ryan. We found one, there's a mollusc. Oh my word, yes. Right, we've got to be really quiet. There it is, guys, but it's swimming away. Please don't swim away. This is a massive mollusc. Wow, and he's got a few of the little longfin bannerfish on him, cleaning him. Let's see if we can get closer. We found one. I've got to be quiet though. Guys, this is the monster fish we came looking for, the mollusc alexandrini, otherwise known as the bumphead sunfish. He's absolutely awesome. So there are five species of mollusc across the globe, but this one, the mollusc alexandrini, is the biggest of them all. Despite starting their lives at only about two and a half millimetres long, when fully grown, these prehistoric-looking ocean giants can reach lengths of over three metres and weigh more than a small calf. This one is probably about two and a half metres long, he is enormous, and you can see the big longfin bannerfish cleaning him. Despite being the biggest bony fish in the ocean, mollars actually have very few bones, and unlike most species of fish, they also lack a swim bladder. Mollars can be migratory, and as adults they feed primarily on jellyfish as they drift in the blue. These ones weren't here to feed though. That is the coolest thing ever! He might stay here a little longer, let's see. Look at him just swimming up towards the surface. You can see here though now that the fusillades are swimming this way, which isn't very good for me because I'm not going to swim super fast to get through this current bit, which we like. You can see as well how the mollar only really has a dorsal fin and his anal fin, he doesn't really have a caudal or tail fin, which is very unique to these guys. This one is super friendly, look at him. Guys, this is the best mollar encounter I've ever had, I'm so happy! Right, let's leave him to it now, goodbye. Guys, I may try again to find some more of these, if I do, here's the footage. If not, I will see you next time. The next day we returned to the same site early in the morning and we were treated to three mollars being cleaned on the reef. Despite heavy rains and gloomy conditions, we did manage to record some of the action. Guys, thanks so much for watching. 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