List of Marine Aquarium Fish Species

Blennies

Blennies are popular aquarium fish, and for good reason. They are peaceful, colorful, and many are downright helpful. For example, the aptly named Lawnmower Blenny will keep your green algae well trimmed and presentable. With the exception of Fang Blennies, Blennies are totally reef safe- in fact a reef environment is really best for them because they can be shy and the intricate rockwork of a reef provides ample hiding spaces. They are omnivores and should be fed a varied diet of frozen or live foods and plant matter. Blennies do not have teeth or functional jaw, so food must be small enough for them to swallow whole.
Blennies are often confused with Gobies, but there is an easy way to tell the difference. Gobies have two distinct dorsal fins, Blennies have a single dorsal fin that runs the length of their body. Also, Gobies' pelvic fins are fused to form a sucker, similar to Remoras.

Common name	Taxonomy	Reef safe	Care Level	Description	Max size
Spinyhead blenny	Acanthemblemaria spinosa	Yes	Moderate	Brown checkered body with distinctive yellow frills on head.	70002000000000000002 cm (0.8 in)
Bicolor blenny	Ecsenius bicolor	Yes	Easy to moderate	Characterized by the striking contrast of a blue head and upper torso followed by a yellow orange lower torso.	700111000000000000011 cm (4.3 in)
Black combtooth blenny	Ecsenius namiyei	Yes	Easy		700110000000000000010 cm (3.9 in)
Blackline fang blenny	Meiacanthus nigrolineatus	No	Easy to moderate	Yellow bodied with bright blue mask and dark black line running from the eye to the caudal fin.	70009000000000000009 cm (3.5 in)
Black sailfin blenny	Atrosalarias fuscus	Yes	Moderate		700110000000000000010 cm (3.9 in)
Blue & gold blenny	Enchelyurus flavipes	Yes	Easy		70005000000000000005 cm (2.0 in)
Bundoon blenny	Meiacanthus bundoon	No	Easy to moderate	Black with lighter patch over caudal fin. Very distinctive swallowtail caudal fin.	70008000000000000008 cm (3.1 in)
Canary fang blenny	Meiacanthus oualanensis	No	Easy to moderate	Similarly shaped to M. bundoon, but canary yellow.	70005000000000000005 cm (2.0 in)
Diamond blenny	Malacoctenus boehlkei	Yes	Moderate	Gray with black splotches, and a yellow mask. Shaped more like hawkfish than a blenny.	70006500000000000006.5 cm (2.6 in)
Ember blenny	Cirripectes stigmaticus	No	Moderate		700112000000000000012 cm (4.7 in)
Lawnmower blenny	Salarias fasciatus	Yes	Moderate to difficult	Tan and brown striped and spotted with iridescence. Requires Mature Tank.	700114000000000000014 cm (5.5 in)
Linear blenny	Ecsenius lineatus	No	Easy		70009000000000000009 cm (3.5 in)
Midas blenny	Ecsenius midas	Yes	Easy to moderate	Although often seen yellow, this fish has the ability to change its color to match the surroundings. It has a very distinctive swallowtail shaped caudal fin.	700113000000000000013 cm (5.1 in)
Molly Miller blenny	Scartella cristata	Yes	Easy to moderate	Mottled tan, white, and black covering the body and fins.	700112000000000000012 cm (4.7 in)
One spot blenny	Crossosalarias macrospilus	No	Easy		700110000000000000010 cm (3.9 in)
Red lip blenny	Ophioblennius atlanticus	Yes	Easy to moderate	Black to grayish yellow with red patch over mouth.	700119000000000000019 cm (7.5 in)
Red Sea mimic blenny	Ecsenius gravieri		Moderate	Sky blue anterior fading to yellow towards the tail, with a black stripe running the eye to the base of the caudal fin.	70008000000000000008 cm (3.1 in)
Sailfin blenny	Emblemaria pandionis	Yes	Moderate	Very similar to Salarias fasciatus but slightly darker and with a much larger dorsal fin.	70005000000000000005 cm (2.0 in)
Segmented sailfin blenny	Salarias segmentatus	Yes	Easy		700110000000000000010 cm (3.9 in)
Starry blenny	Salarias ramosus	Yes	Easy		700114000000000000014 cm (5.5 in)
Striped blenny	Meiacanthus grammistes	Yes	Moderate		700112000000000000012 cm (4.7 in)
Tail spot blenny	Ecsenius stigmatura	Yes	Moderate	Drab tan all over with dark spot at the base of the caudal fin and a light yellow line through eye.	70006000000000000006 cm (2.4 in)
Two-spot blenny	Ecsenius bimaculatus	Yes	Moderate	The top half of this fish is black towards the front and fades to white closer to the tail. The bottom half is white with two distinctive black spots right under the pectoral fins.	70004500000000000004.5 cm (1.8 in)
Convict blenny	Pholidichthys leucotaenia	Yes	Moderate	Not actually a blenny but from closely related family Pholidichthys. Juvenile has black eel-shaped body with a distinctive white stripe running down the body. Adults are yellow and black striped.	700134000000000000034 cm (13.4 in)