Hi everyone,

I am a scientist from Australia - I am looking for participants for some new research I am doing.

Are you the parent/caregiver of a child aged 2-12 years? If so, we kindly invite you to participate in our short online survey about sharks. We are interested in what children know about sharks, so this survey involves you completing a couple of questions about sharks, and then asking your children some questions about sharks. You will then be asked to write what your children say or what they do (e.g. if they use hand gestures).

LINK TO SURVEY:

https://research.unisa.edu.au/redcap/surveys/?s=XYPHMNMKFEJR7H4P

Please also feel free to send to any one you know who might be interested.

The survey takes approximately ten minutes per child to complete, if you have more than one child aged between 2-12 they can all participate.

This study has received ethics approval from the University of South Australia (#206267). If you have any queries, please contact the lead researcher: Brianna.lebusque@unisa.edu.au

Not sure if anyone really uses this sub anymore but if anyone does i would like some help. I have a couple of Crimson Spotted Rainbow fish that i caught by net from the Mary River. I have had about 8 of them in a fairly large tank for about 2 months now and they haven’t mated yet. I’m not too sure how to tell apart males from females and there isn’t really any information at all on google or anything as they are such a unique species. If anybody knows anything i would appreciate some help

What’s this little guy? Looks like a catfish. Found him dead on a beach in NSW. He has a spike in front of his dorsal fin.

It's about 5cm long. We have a water feature in our back yard with some plants in it. We went away for Xmas and come back to find this in the pond. We have no idea how it got there, only guess is it's egg was in a plant that we bought just before going away.

I recently stocked one of my farm dams with eeltail catfish and I’ve been trying to research how quickly they grow to find out how long until they will start to reach eating size but all I can find is the age they mature at. Any help is greatly appreciated, thanks.

From my balconey in my box in the sky here on the Gold Coast, I can see down into a nearby canal. Along with watching the sting rays feeding, I occasioanly spot what looks like an Eagles Ray of some sort ? It looks from my position loke a small Manta Ra (not suggesting it is, just saying thays what it looks like), black back, white underside very languid movement. Not sure its the same one but I see them (it) semi regularly.

Just curious what it might be ? A Southern Eagle Ray ? But it is black on top, so I am not sure.

Obligatory am on mobile message. I've tried to break the post up with spaces for readability.

Tldr; female goby is aggressive, possibly killing her boyfriends.

We have a 120L tank with a small female desert goby. We are 99% sure she's female.

This is her: https://imgur.com/a/fd5SfCf

Our problem:

she's killed two potential boyfriends so far.

Questions:

• based on a quick review of the literature, I can't find anything on female aggression. Is this normal?
• could she actually be a male desert goby. I've read that if a male exposed to a female then exposed to a male, they're more aggressive, especially if they're smaller in size. She has been exposed to other females and males in the tank she was originally kept in before we purchased her.

Potential relevant history:

• not aggressive to other tank mates, some of whom are smaller than her

• aside from the large snail, she's the only animal that hangs out at the sediment-water interface

• when the tank was originally established, we introduced some gouramis. They were (unknown to us) carriers of white spot. This caused an aquarium wide infection, female goby and first male goby were infected. After adequate treatment, infection has been cleared. No signs of infection for the past month.

• First male goby died after a week the tank had been cleared. Cause of death unclear. This is because he physically had no spots left. Still active behaviour. Will accept that maybe he died by white spot but seems unlikely.

• new male introduced one week later.

• Visually observed female goby attacking the new introduced male by grabbing his rear fin, biting and twisting aggressively. Male found dead next day.

Edit: I'll be extremely grateful for any advice or any experts that y'all can point me in the direction of. Thanks in advance.