How related are they?
Same genus, Ecsenius (Coralblennies): very close cousins
They split at the species level: the Bicolor Blenny belongs to Ecsenius bicolor (Bicolor Blenny), the Tailspot Blenny to Ecsenius stigmatura (Tailspot Blenny).
Find the Bicolor Blenny on the tree · Find the Tailspot Blenny on the tree
Family lines, side by side
Highlighted rows are groups both animals belong to. The marked row is where their lines go separate ways.
| Rank | Bicolor Blenny | Tailspot Blenny |
|---|---|---|
| Kingdom | Animalia Animals | |
| Phylum | Chordata Chordates | |
| Subphylum | Vertebrata Vertebrates | |
| Infraphylum | Gnathostomata jawed vertebrates | |
| Parvphylum | Osteichthyes bony fishes | |
| Gigaclass | Actinopterygii ray-finned fishes | |
| Superclass | Actinopteri | |
| Class | Teleostei Teleost fishes | |
| Order | Blenniiformes Blennies and kin | |
| Family | Blenniidae Combtooth blennies | |
| Subfamily | Salariinae Algae-scraping blennies | |
| Genus | Ecsenius Coralblennies | |
| Species split | Ecsenius bicolor Bicolor Blenny | Ecsenius stigmatura Tailspot Blenny |
Care, side by side
| Fact | Bicolor Blenny | Tailspot Blenny |
|---|---|---|
| Type | Fish · Blenny | Fish · Blenny |
| Care level | Easy | Easy |
| Reef safe | With caution | Yes |
| Temperament | Peaceful | Peaceful |
| Diet | Herbivore | Herbivore |
| Favorite foods | Film and turf algae grazed from live rock, Nori (dried seaweed) on a clip, Spirulina and other algae-based flakes or pellets | Film algae and microalgae grazed from rock and glass, Nori (dried seaweed), Spirulina flakes and herbivore pellets |
| Max size | 4 in (10.2 cm) | 2.5 in (6.3 cm) |
| Minimum tank | 30 gal | 20 gal |
| Temperature | 72–78 °F | 72–78 °F |
| Salinity (SG) | 1.020–1.025 | 1.020–1.025 |
| pH | 8.1–8.4 | 8.1–8.4 |
| Lifespan | Not well documented. One care guide gives about 2-4 years in the wild and up to about 10 years in captivity with good care; treat these figures as rough. | About 3-5 years according to hobby care guides (Salt Water Aquarium Blog); not well documented. |
| Breeding | Very hard | Very hard |
| Conservation (IUCN) | Least Concern | Least Concern |