Can a fish be born male and end up female?

01:21 The animal that folds into a barrel to survive 10 views · 2 hours ago 01:13 An Arctic shark that may be over 270 years old 3 views · 11 hours ago 01:12 A rat learns more by watching another fumble 12 views · 14 hours ago 01:10 A compass that only works under certain colours 13 views · 17 hours ago 01:18 The shark that senses prey hidden under sand 15 views · 20 hours ago 01:28 A frog frozen solid, heart stopped, that restarts when it thaws 12 views · 23 hours ago 01:08 Can a dog sense a blood sugar drop before its owner does? 19 views · 1 day ago 01:14 Rising Prices of Compound Feeds in Tunisia: +20 to +40 DT/Tonne 6 views · 1 day ago 02:08 A US nuclear-related test, an earthquake in Egypt and a flood of shrimp in Tunisian markets: what is happening in the Mediterranean? 11 views · 1 day ago

01:21 The animal that folds into a barrel to survive 10 views · 2 hours ago 01:13 An Arctic shark that may be over 270 years old 3 views · 11 hours ago 01:12 A rat learns more by watching another fumble 12 views · 14 hours ago 01:10 A compass that only works under certain colours 13 views · 17 hours ago 01:18 The shark that senses prey hidden under sand 15 views · 20 hours ago 01:28 A frog frozen solid, heart stopped, that restarts when it thaws 12 views · 23 hours ago 01:31 An ant that dies clamped to a leaf, at just the right height 20 views · 1 day ago 01:22 The gecko walks on ceilings without a drop of glue 20 views · 1 day ago 01:00 The water strider stands on water without sinking 19 views · 1 day ago 01:20 A sub-millimetre animal that shrugs off radiation 27 views · 2 days ago 01:13 The crow that was never caught still knows the face 14 views · 2 days ago 01:18 Do octopuses copy each other? 17 views · 2 days ago

01:08 Can a dog sense a blood sugar drop before its owner does? 19 views · 1 day ago 01:11 Does your cat meow the same way to everyone? 39 views · 1 day ago 01:12 Do dogs recognize their owners after years apart? 14 views · 3 days ago 01:13 Why do cats land on their feet? 21 views · 3 days ago 01:40 The roadrunner, rattlesnake killer 56 views · 1 month ago 02:37 In western diamondback rattlesnakes, pheromones work like a dating app 46 views · 1 month ago 01:51 The megalodon: a monster of colossal proportions 31 views · 1 month ago 02:45 Diving into the heart of the "Devil's Hole" 33 views · 1 month ago 01:02 Do you know the tuatara, New Zealand's most ancient resident? 32 views · 1 month ago 01:58 How does the bioluminescent millipede produce light? 29 views · 1 month ago 02:32 The glass frog: a stunning amphibian with transparent skin 34 views · 1 month ago 03:50 An Asian otter is expecting babies! | A SEASON AT THE ZOO 34 views · 1 month ago

00:46 Fish that farm their own light 10 views · 3 days ago 02:25 The giant squid, the sperm whale's favourite food 40 views · 1 month ago 02:23 The sea otter, an aquatic animal par excellence 34 views · 1 month ago 02:15 The sea otter, guardian of the underwater forest 36 views · 1 month ago 02:24 The sea cucumber: a marine curiosity essential to the ecosystem 34 views · 1 month ago 01:57 The star-nosed mole, a creature of darkness 34 views · 1 month ago 02:32 The sunflower starfish: a true octopus predator 32 views · 1 month ago 01:36 This dangerous giant starfish has 18 arms 38 views · 1 month ago 02:15 The Amazing Relationship Between the Hermit Crab and the Sea Anemone 33 views · 1 month ago 02:01 How do sea anemones reproduce? 30 views · 1 month ago 01:15 Sea Anemone: A Deadly Hazard 33 views · 1 month ago 02:32 Australia's Deadly Jellyfish 32 views · 1 month ago

01:59 This picture-perfect snowy egret family has a dark secret 43 views · 2 months ago 02:08 The goliath heron, the world's largest heron species 51 views · 2 months ago 01:13 The horned screamer, an exceptionally rare heron 44 views · 2 months ago 01:10 Slender legs, piercing eyes, and pointed bill: the squacco heron's formidable hunting prowess 40 views · 2 months ago 02:09 Discovery of a perfectly preserved pliosaur skull 41 views · 2 months ago 01:45 The Most Complete Plesiosaur Skull Ever Found 38 views · 2 months ago 01:50 Cuckoos: absent parents with a remarkably effective strategy 39 views · 2 months ago 01:55 The Kingfisher's Insatiable Appetite 60 views · 2 months ago 02:59 Ravens fight for survival on the walls of El Capitan 61 views · 2 months ago 02:28 This little owl only sees with one eye 53 views · 2 months ago 02:41 The talent of the osprey, a formidably efficient raptor 55 views · 2 months ago 02:20 The extremely rare California condor, emblematic of the Grand Canyon 51 views · 2 months ago

00:28 At the heart of the hive 140 views · 2 months ago