NEW FISH JUST DROPPED

Is it known what baby coelacanths look like??

Yes! An expedition filmed one in Manado Bay, North Sulawesi, Indonesia in 2009!

"It was measured by a laser beam from the R.O.V. to be 31.5cm. The fish was positioning itself in a small cave."

" Mesmerizing " // © Maxwel Hohn

Music: Gibran Alcocer - Idea 22 (Sped Up)

I made the t-shirt design I wanted, so it's on Redbubble if anyone else want it too or whatever

Daily Cephalopod #2

Today is Wet Beast Wednesday!

Today’s wet beast is: Man-of-war Fish

Olive’s wet beast fact: this little fishy has evolved to live within the extremely dangerous tentacles of the Portuguese Man O’ War. It is here that the fish feasts upon their gonads. Happy Pride.

Stay tuned for more Wet Beast Wednesdays!

Bristled Sponge Crab, Austrodromidia octodentata, family Dromiidae, South Australia

Photograph by Steve Johns

Vessel sound is temporarily causing hearing loss in squids

Globally, anthropogenic sounds have become louder and more persistent, however, little is known about how invertebrates detect and respond to human-made sound. Now, new research shown noise associated with boats causes  causes temporal hearing loss in squids across different stages of their life cycle.

The hummingbird bobtail squid (Euprymna berryi) has a short lifespan of at least 6 months, which make them a convenient animal for lab studies. Hearing and behavioural observations were made by researchers before, during and after 15 minutes of vessel sound playback, to test how these squids react to noise pollution, and noted that these squids decrease their hearing sensitivity after exposure to noise, and particularly noise affected juveniles. Juvenile squids experienced an important hearing loss sensitivity after noise exposure between 400 and 800 Hz, while adult and mature squids decreased their sensibility after 200 to 600 Hz exposure, showing more resistence. All squids recovered auditory sensitivity within two hours.

Researchers aim the inclusion of cephalopods within management and policy, because anthropogenic activities and associated sound levels in the ocean are increasing, while the role sound plays in cephalopod life history is only just beginning to be understood.

Photo by Pascal Girard

Reference ()  Putland et al. 2023. Vessel sound causes hearing loss for hummingbird bobtail squid (Euprymna berryi). Frontiers in Marine Science 

Daily Cephalopod #73