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Phylum Chordata > Subphylum Vertebrate > fishes > Family Gobiidae > mudskippers
Yellow-spotted mudskipper
Periophthalmus walailakae*

Family Gobiidae
updated Oct 2016

Where seen? This large spotted mudskipper is sometimes seen in our mangroves, or on mudflats and sandflats near mangroves.

Features: To about 13cm long, those seen about 8-10cm. It has a greyish body with scattered yellowish spots all over the 'cheeks' and body. There are brownish spots on the upper body.
No irridescent blue spots. The first dorsal fin has a rounded margin, is brownish red with a broad black band and narrow white margin. The second dorsal fin has a black stripe in the middle. The two dorsal fins are well separated. The pelvic fins form a complete disk.

Sometimes mistaken for and It was previously mistaken as juveniles of the Giant mudskipper (Periophthalmodon schlosseri). Unlike the Giant mudskipper, the Yellow-spotted mudskipper does not have a broad black band along the body length and lacks the white-bluish, iridescent speckles often seen on the Giant mudskipper's cheeks.

Juvenile Yellow-spotted mudskippers can also be mistaken for other small mudskippers.
More about how to tell apart small mudskippers commonly found on our shores.

It is said to be nocturnal, leaving its burrow at night to forage and returning to the burrow in the morning. But this pair in the photo on Chek Jawa were frolicking out in the mid-day sun with the incoming tide, among other kinds of mudskippers.

A quarreling pair.
Chek Jawa, Oct 07

Sungei Buloh Wetland Reserve, Feb 05

Juveniles often mistaken for other mudskippers.
Pasir Ris, Oct 09

*Species are difficult to positively identify without close examination.
On this website, they are grouped by external features for convenience of display.

Yellow-spotted mudskippers on Singapore shores

Photos of Yellow-spotted mudskippers for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map

a mudskipper's short story from SgBeachBum on Vimeo.

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