Mermaidfrenzy - To The Stars Who Listen

Zebra sharks got their name from the stripes they have as pups which become spots when they become adults.

Newly Explored Deep Sea Octopus Nursery Is Just the Third Ever Discovered

A recent expedition to the waters of Costa Rica has yielded new discoveries about deep sea octopuses.

Marine scientists appear to have found some more natural wonders of the ocean: not one, but two deep-sea octopus nurseries in the waters of Costa Rica. One of these nurseries was previously thought to be inhospitable for eggs to hatch in, while the other was undiscovered until now. The team of scientists also believe that the octopuses nursing there might be a novel species, and the area itself is teeming with other sea life. Octopuses are generally considered to be solitary creatures. But there are some species known to be exceptions to this rule, and some circumstances where normally isolated octopuses will group together. In recent years, scientists have come across parts of the ocean filled with hundreds or more of octopus mothers protecting their eggs until they hatch—so-called nurseries. These gatherings are also sometimes called octopus gardens...

Read more: https://gizmodo.com/newly-explored-deep-sea-octopus-nursery-is-just-the-thi-1850591141

There are approx. 200 species of scyphozoa (true jellyfish)! They’re separated into 4 orders, those being: stauromedusae, coronatae, semaeostomeae, and rhizostomeae.

Hydrozoans are similar, but different. They are closely related and share a lit of similarities.

To help with this: Portuguese man o’wars and by-the-wind-sailors aren’t true jellyfish. Helmet jellies, cannonball jellies, and cauliflower jellies are true jellyfish

Daily fish fact #565

White croaker!

They’re named after the croaking sound they can make via repeatedly rasping a muscle against their swim bladder! And also they’re pretty silvery and light-coloured on their stomach.

HI idk if any of these r repeats (sorry if they are😖😖) but id love 2 see facts abt panther groupers!! gars are also rlly fun imo any kind and i also love sturgeons..... if u have any fun facts abt the differences between types of sturgeons i would rlly love 2 hear !!!! sorry again if this isnt the kind of stuff u wanted 2 hear omg . love ur blog keep it up💕💕💕💕💕‼️

Thank you for your kind words friend! Of course I'm happy to provide! :DD I do repeats all the time so it's completely fine, and even then I have not done panther groupers yet! So...

Daily fish fact #570

Panther grouper!

Juvenile panther groupers are pure white with black spots, but as they age they gain splotches of beige and grey! They're also called humpback groupers because of their distinct hunched form.

And there you have it! I shall do gars and perhaps a sturgeon next! Differences between sturgeon species, I'm not so sure about... they all vary from each other in different ways, like distribution, body shape, colouration, snout length and shape, and so on! My good buddy @sturgeonposting has several informational posts about sturgeons, so be sure to check them out if you want to see many facts!

Daily Cephalopod #58

Wake up babe new fish dropped

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