A new study by Ziegler and Sargony (2021) has demonstrated how non-invasive methods can be used to record and catalogue new species of megafauna. Traditional methods including collecting specimens to handle physically which, aside from killing the specimen, can also damage the structures of the organism - impairing proper scientific understanding. While non-destructive imaging techniques have proven effective in describing novel species of small organisms this is the first time it has be utilised for a deep-sea megafauna, the cirrate octopus - Grimpoteuthis imperator.
A recent study in the journal of Marine Biology has tested a different method of investigating social behaviour in octopuses. Traditionally octopuses have been seen as asocial creatures that ignore others of their species (conspecifics) but recent discoveries of aggregations or groups of wild octopuses such as: algae octopuses (Abdopus aculeatus), Graneledone octopuses, Muusoctopus octopuses, Caribbean Reef Octopuses (Octopus briareus), Atlantic pygmy octopuses (Octopus joubini), Octopus laqueus, Common Sydney octopuses (Octopus tetricus) and Vulcanoctopus hydrothermalis.
Atlantic salmon (Salmo salar) are an important species of fish both for their ecological value and commercial value. These anadromous fish are spawned in rivers, travel to the sea to grow and mature before returning to the stream or river they were born in to spawn the next generation. As such the ability to swim against strong currents and up natural barriers is important, which is why a recent study published in the Canadian Journal of Zoology is concerning.
Leatherback turtles (Dermochelys coriacea) are the largest species of sea turtle. Found around the world's oceans they travel distances up to 4,828 km, using their large pectoral flippers to swim as fast as 24kph. Diving to as deep as 1000m these turtles follow the diel movements of jellyfish - their preferred prey.
A recently recorded population of Indo-Pacific Humpback dolphins has been observed using their own distinct whistles which have longer durations, lower frequencies and fewer inflection points. Not only does this suggest they are an independent population but researchers suggest that the specific features of this delphinid language are used to communicate more effectively in the waters around Hainan Island, Zhanjiang, and Sanniang Bay.
Many planktonic larval invertebrates have spiny protrusions, a recent study shows that these spines work with limb movements to help nauplii swim efficiently.
Cephalopod Hallucination | Alien Intelligence 4K ~ 4 years searching for cephalopods and this is what I've seen. Location filmed: Indonesia, Philippines, Australia and Canada.
A new study by Mason, Kent and Bilgmann (2021) has shown that a resident population in Port Phillip, Australia, show much stronger social bonds than their offshore counterparts.
Mytilus mussels are keystone species in the Baltic Sea: they build reefs which provide more complex habitats for various species (macrofauna, macroalgae and meiofauna), filter water (linking the pelagic and benthic systems) and are a staple food source for numerous organisms (eider ducks, flounder, crabs, starfish and the larval stages feed herring larvae and other carnivorous zooplankton). They can also be extremely numerous – forming up to 90% of the animal biomass in some shallow waters.
It’s tough being an acorn barnacle - you want a nice turbid environment with plenty of oxygen and food but getting there as a larvae less than 6mm long is a heck of a challenge. That’s why acorn barnacle cyprids are astonishing swimmers.
Fin whales (Balaenoptera physalus) have resident populations in three different regions - including the Gulf of California. Daniela Bernot‐Simon, Lorena Viloria‐Gómora, Alejandro Gómez‐Gallardo and Jorge Urbán R. have now found evidence of the fin whale calving ground in the resident Californian fin whales. While numbers are recovering with around 100,000 individuals globally, fin whales are still listed as vulnerable by the IUCN Red List.
A new study by Xiyang Zhanga, Fengping Zhana, Ri-Qing Yu, Xian Sun and Yuping Wu has found that pregnant Indo-pacific humpback dolphins transfer organic contaminants to their unborn offspring. Their investigation found that polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCB) were all found in both the mothers and foetuses.
Every year, between late Austral Spring and early Autumn, a natural phenomenon takes place near Bremer Bay in the western Great Australian Bight. Over one hundred orcas congregate over the continental slope near the head of the Hood Canyon.
Most people will be familiar with the threat macroplastic debris poses to pinnipeds - asphyxiation, choking, blocking the digestive tract, open wounds (tightening around growing animals or pulled tight by drag in the water) and/or impairing the ability to forage successfully.
Blacktip Reef sharks (Carcharhinus melanopterus) are one of the most common sharks found in the Indian and Pacific oceans. Their abundance makes them an important apex predator exerting top-down control - helping to structure inshore ecological communities.
Syngnatharia are a diverse clade of percomorph fishes found throughout tropical and warm-temperate waters with many of its members found in the Indo-Pacific. The group includes: trumpetfishes, goatfishes, dragonets, flying gurnards, seahorses and pipefishes of which seahorses will be immediately familiar to most people. Their wide distribution combined with the long-rang dispersal capabilities of many of its members has made it challenging to pin down where in the world this group of fishes comes from.