Deep Water fish weird

Weird fish of the week: Kroyer's deep-sea angler fish

Weird fish of the week: Kroyer's deep-sea angler fish

Copyright © Andrew Butko

There seem to be few fish from the ocean's depths that don't fit the 'weird fish' epithet and Kroyer's deep-sea angler fish, Ceratias holboelli, certainly shows no sign of bucking the trend.

Also given the common name of 'sea-devils', these abyssal oddballs look rather like an under-inflated balloon after a fight with a porcupine.

Seemingly made up largely of a huge, gaping mouth filled with equally enormous dentition they spend their time lurking in the deep sea, living up to their angler moniker by attracting unfortunate prey towards their cavernous gape with the help of a bioluminescent lure on the end of a stalk attached to their head.

The scientific name Ceratias comes from this lure, being derived from the Greek word 'keras' meaning horn.

If the fish isn't weird enough just to look at, it has an even stranger reproductive strategy that it shares with some other angler species. There is a huge difference in size between male and female Ceratias holboelii, females are the largest of their family, growing up to 120cm/4ft while the males seldom exceed 15cm/6in. This discrepancy in size is largely because the males do not feed in the same way as their larger mates. ng for as long as it takes to find a suitable host using powerful olfactory organs to hunt them via a trail of pheromones before they starve.

Once attached to the female, the male releases an enzyme that helps fuse them together, slowly losing his digestive system, then brain, heart and eyes until he is little more than a pair of gonads ready to supply sperm in response to hormonal changes in the females bloodstream which he is now permanently attached to.

More than one male can become attached to a female in this way, meaning she has a selection of mates at hand whenever she is ready to spawn.

Why not check out the other Weird fish of the week features?
Tripod fish


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She's got a pretty good prey drive, she likes to

2010-12-24 05:29:35 by PawsClawsWings

CHASE things that you throw, or birds overhead in the sky, but once it stops moving she couldn't care less. She stops running when the ball rolling. She won't put her mouth on anything you throw though, like balls/sticks/plush toys/etc. Like I mentioned, she does like to climb onto things, and if she can get her front paws onto it standing up, she can get the rest of herself onto it one way or another, even if it means flopping onto her side like a dead fish and scraping herself up there.
She's also very watchful, and carefully observes everything that goes on in and outside of the house, but rarely makes a sound unless she's excited and playing, and even then it's usually one low huff more than a bark


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