A Southern California aquarium has successfully bred the rare weedy sea dragon, the lesser known cousin of the sea horse that resembles seaweed when floating.

Following a dramatic decline in numbers over the past decade, White's seahorse, also known as the Sydney seahorse, has recently been listed as an endangered species in NSW. It is now Australia's only threatened seahorse species and the second endangered seahorse species worldwide.

Fifty newborn red handfish are giving IMAS scientists an opportunity to help save the last known populations of the world's rarest fish.

While monitoring of cryptic and elusive tiny creatures, such as pygmy seahorses that measure only 13 to 27 mm, might be too costly and time-consuming for research teams and institutions, the underwater activity might be proving of particular interest to photography and diving enthusiasts.

Cod, sole and plaice might be regulars on European dinner tables but as climate change heats the oceans common species are heading to cooler northern waters—with profound potential consequences for fish stocks and consumers.