All about fish, new species, new discoveries and all kind of interesting things about fish

Aquarium Industry

Everything about new equipment, breeders and other news about ornamental fish

Weird, Cool & Fun

Weird things about fish, fishkeepers, fish shops, shows and more.

From the wild

News from the wild, new species, things happening in fish habitats and more.

Zoo & Aquariums

What’s happening in Zoo’s and public aquariums, read the news here.

Home » Fish

Why Guppies Seem to Have a Death Wish

Submitted by on April 30, 2013 – 11:17 pmNo Comment |


Guppy owners know to keep the lid on their aquarium tightly sealed. Otherwise, the colorful little fish will leap to their deaths. Possibly into a chai latte. That’s where one seemingly suicidal guppy in a University of Maryland lab ended up, anyway. That latte belonged to biologist Daphne Soares’ iced chai latte, and she decided to get to the bottom of this peculiar behavior.

Usually, when fish jump they do so to escape a predator or to catch prey, Soares explains in a PLoS One paper. But for guppies, this is not the case. They jump completely unprovoked.

Puzzled, Soares and a colleague used high speed video imaging to analyze the specific movements that make up guppy jumps. The fish tended to jump by slowly backing up while using its pectoral fins (the ones on the side of its body), then strongly thrusting its body and launching itself into the air. It’s kind of like they’re backing up to get a running start. The researchers write:

The liftoff phase of the jump is fast and fish will continue with whole body thrusts and tail beats, even when out of the water. This behavior occurs when fish are in a group or in isolation.

Soares started thinking more about the conditions guppies live in in the wild. In their native mountainous streams of Trinidad, guppies manage to colonize different pools and areas of water blocked by barriers such as rocks and logs. Guppy jumping, Soares figured, may have evolved as a way to get the fish from one part of the stream into another.

Because guppy jumping events start slowly with a preparatory phase, and occur without external stimulation, we hypothesize that a jumping behavior is deliberate and has been selected as a strategy for dispersal.

So aquarium-leaping guppies don’t necessarily have a death wish, they just want to colonize the next pond—or latte—over. Unfortunately, there isn’t one there most of the time, and chai lattes aren’t exactly hospitable environments for fish.

Source: Smithsonian

Tags: ,

Leave a comment!

Add your comment below, or trackback from your own site. You can also Comments Feed via RSS.

Be nice. Keep it clean. Stay on topic. No spam.

You can use these tags:
<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>

This is a Gravatar-enabled weblog. To get your own globally-recognized-avatar, please register at Gravatar.