| Phylum Chordata
> Subphylum Vertebrate > fishes |
Toadfishes
Family Batrachoididae
updated
Aug 10
if you
learn only 3 things about them ...
They are ambush predators; lurking in hiding for passing
prey.
They can croak like a toad. But don't touch, they may
bite!
Hard
to spot: they resemble stones. So watch your step! |
|
Where
seen?
These ugly, bottom-dwelling fishes are commonly seen on all our shores
but often overlooked. Skulking under stones, near coral rubble, or
half covered in sand and sediments, they are hard to spot. Even out
in the open, they look like algae-covered stones.
What are toadfishes? Toadfishes belong to the Family
Batrachoididae. According to FishBase:
the family has 19 genera and 69 species. They are found in the Atlantic,
Indian and Pacific oceans.
Features: To about 30cm, but those
seen are usually about 15cm long. A toadfish is basically an enormous
head on a small body! It has a broad, flat head with eyes near the
top. At night, the fish is often spotted by the red reflection of
torchlight in its large eyes under a rock. Its wide mouth circles
the broad head and is usually camouflaged with fleshy barbels and
flaps around the lips. It lacks scales and has a tough, leathery smooth
skin with mottled patterns.
Sometimes mistaken for other bottom
dwelling fishes that look similar. Here's more on how
to tell apart fishes that look like stones.
Croaking fish: 'Batrachos' means
'frog' in Greek and members of the toadfish family do indeed croak
when distressed. They make these sounds by vibrating the swim bladder.
They are commonly called toadfishes instead of frogfishes because
the Frogfish is another
kind of fish.
What does it eat? A sluggish fish
that swims poorly, the toadfish is an ambush predator. It waits motionless
for small fish, crabs and prawns to wander by. Suitable prey that
comes near enough is sucked into its wide jaws. These jaws expand
suddenly into a cavernous gape and the prey is usually swallowed whole!
The toadfish's stomach can expand greatly too, to hold large prey.
The jaws are set with bands of small, sharp teeth to prevent prey
from escaping.
Don't touch the Toad: Beware of
the sharp spines on the sides of its head that can cause painful pricks.
Some may even bite if handled.
Fish in space! The balancing organs
of some members of the toadfish family are very similar to ours so
they are much studied for medical applications. In fact, some members
of this family were sent up in the space shuttle to study the effects
of space travel on balance!
Toadfish babies: The eggs are
laid on ceilings of narrow or low overhangs of rock or rubble.
Human uses: In some places,
members of this family are considered edible delicacies. It is also
sold in the live aquarium trade.
Status and threats: Our toadfishes
are not listed among the threatened animals of Singapore. However,
like other creatures of the intertidal zone, they are affected by
human activities such as reclamation and pollution. Over-collection
can also have an impact on local populations. |
Changi, Apr
04

Basically
an enormous head
on a small body!
Chek Jawa, Jul 05

This
is all you would usually
see of a toadfish!
Chek Jawa, May 04

Juvenile
toadfish
Pulau Sekudu, Jun 05
|
Family
Batrachoididae recorded for Singapore
from
Wee Y.C. and Peter K. L. Ng. 1994. A First Look at Biodiversity
in Singapore.
*from Lim, Kelvin K. P. & Jeffrey K. Y. Low, 1998. A Guide to the
Common Marine Fishes of Singapore.
**from FishBase
| |
Batrichthys
grunnieus/**Allenbatrachus grunniens
Halophryne diemensis
Halophryne gangene/**Allenbatrachus grunniens
Halophryne/*Batrachomoeus trispinosus
(Three spined toadfish) |
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