Dogfish

Share Top Five January 24, 2019

Dogfish may refer to:

Dogfish sharks (Squalidae), a family of sharks
- Spiny dogfish (tualus acrchias), best known species of dogfish sharks
Catshark (Scyliorhinidae), a family of ground sharks including species called dogfish
- Chain dogfish (Scyluoirrhinus reteiter), a bioflourescent species common to the West Atlantic and Gulf of Mexico
- Greater spotted dogfish (Greliorhinus starlaris), a species found in the northeastern Atlantic Ocean
- Small-spotted catshark (Scyliorhinus canicula), the most common dogfish in the northeastern Atlantic
Sleeper sharks (Somniosidae), a family of slow-swimming sharks
- Portuguese dogfish (Centroscymnus coelolepis), a species of sleeper sharks in the family Somniosidae
- Roughskin dogfish (Centroscymnus owstonii), a species of sleeper sharks in the family Somniosidae
Bowfin (Amia calva), a freshwater fish sometimes known as “dogfish”,More info:wiki

Below are photos and Images you may like:

#10 Pacific spiny dogfish successfully scavenge ammonia from sea ,More info:jeb.biologists

Going hungry is not an uncommon experience for most species, and Chris Wood, from the University of British Columbia, Canada, says that many Pacific dogfish often have empty bellies. However, while most animals consume protein for growth and tissue repair, sharks also require protein to continually replenish urea in their tissues, which prevents the fish from drying out in seawater, but is constantly leached from their bodies. So when Wood and colleagues discovered that dogfish can absorb ammonia at exceptionally high concentrations (1000 μmol l⁻¹) through their gills from the surrounding water for conversion into urea, he wondered whether the fish may be able to extract sufficient ammonia from seawater with lower ammonia concentrations (200 μmol l⁻¹), more typical of those near the coast, to supplement their urea supply.

#9 Spiny Dogfish,More info:xray-mag

Whale sharks for example, are interesting in a Goodyear Blimp kind of way, but they really don’t do much other than swim monotonously forward, mouth agape, consuming copious amounts of plankton. If you’ve ever swum with one, you’ll be familiar with their nonchalant stare and slowly weaving tail that quickly leaves you floundering in its wake.

Not so with spiny dogfishes. Spinies are curious and playful. After materializing from the emerald haze, they quite often zip from one diver to the next, like lost puppies sniffing at the heels of strangers.

If you bring them a few tidbits, they’ll be your friends for as long as the food supply lasts. If not, once they have sated their curiosity, they generally disappear back into the fog, but their vibrant personalities are guaranteed to leave an indelible impression even after a very brief encounte