To follow up on yesterday’s blog about Candy-Stripe Shrimp and their association with Crimson Anemones, here’s another ambassador from my last dive who shatters the notion that these waters do not explode with colour and biodiversity.
This little Longfin Sculpin was at only 1 m depth. I saw him/her immediate when I descended and had such good fortune that the fish did not dart away. It’s usually what they do.
Longfin Sculpin = Jordania zonope to 15 cm long. May 20th, 2020 near Telegraph Cove.
May 20th, 2020 near Telegraph Cove.
JUST LOOK at the colour, the patterns, the texture . . . and the gossamer fins.
Here’s another individual from a different dive to give you a sense of the variation in colour and patterns. This colouration and banded pattern often helps them camouflage because so much of the life in these waters is brightly coloured.
June 9, 2019 Hanson Island
BUT Longfin Sculpins are among the local fish species that change colour at night. They darken to match their nocturnal surroundings so they have a better chance of . . . seeing another day.
The photo below shows how extreme this colour change is.
March 5th, 2013 Port Hardy.
This is known as “nocturnal protective colouration” and this adaptation is not unique to species of fishes but is also found in birds, mammals, insects, etc
The males are apparently also darker when courting females and protecting eggs. They are very territorial when egg-guarding.
A Longfin Sculpin in “Spider Man” mode. September 9, 2011 Pearse Island.
Further information from Dr. Milton Love’s Certainly More Than You Want to Know About the Fishes of the Pacific: “Young settle out of the plankton when around 2.3 to 3 cm long and then live a life where they are mostly solitary (other than to mate and egg guard) and rarely swim more than 0.5 m off the bottom. They use their pectoral fins to crawl around and hang on, even able to kind of “Spider Man” it by hanging on to vertical walls, head oriented downward. They are reportedly highly territorial with domains being from 0.3 to 0.5 metres squared / individual) . . . There have been some observations of the species cleaning the mouths of Lingcod, amid their many and very sharp teeth.”
Below, is one of Jan Kocian’s amazing captures (and cartoons) of a Longfin Sculpins serving as a cleaner fish to a Lingcod.
Scalyhead Sculpins have also been documented by as cleaner fish to Lingcod.
More often than eating snacks found on Lingcod 🙂 , Longfin Sculpins’ diet is “benthic arthropods” which include crabs, hermit crabs, isopods and shrimp. This is the diet of many sculpin species but one study found that Longfin Sculpins take bites out of their prey where other species like Scalyhead Sculpins swallow them whole.
There’s a whole lotta fish procreation going on in the NE Pacific Ocean right now. This might be a surprise to those who think mating is more of a spring-fling-kinda-thing.
It may be a further surprise that, for many marine fish species here, the males are the protectors of the next generation. The females leave after laying the eggs and the males remain, guarding the fertilized eggs from predators and often also fanning the eggs to ensure they are well aerated.
For a lot of these fish species, the male chooses the nesting site and entices multiple females to lay eggs there so that he can fertilize them. He then has the work of guarding these multiple egg masses and may need to be on the alert for sneak fertilization attempts by other males.
For species with nests of multiple egg masses, you can often tell how many females have laid eggs there because individual females have different coloured eggs. Therefore, the colour of fish eggs is not a good characteristic to determine the species that laid them. Instead, do a quick scan, chances are a piscine papa is somewhere near the eggs, staring at you.
Through the photos below, meet some of these fabulous fish fathers. No deadbeat dads here!
[Note that this is in no way a comprehensive list of NE Pacific Ocean fish species in which the males guard the eggs.]
Whitespotted Greenling
The encounter documented below shows how my dive buddy and I recently had a whitespotted greenling come after us, so intent was he on protecting his egg masses. I was very slow in cluing in that this was why he was swimming around us and deserved getting a little nip in the head. Notice how small he is relative to us and yet how this did not deter him in trying to get rid of us.
My observations of egg guarding on NE Vancouver Island: September to December
Kelp Greenling
Most often Kelp Greenling eggs are in the empty shells of giant barnacles as shown below. Although they are a bigger member of the Greenling family, male Kelp Greenlings do not appear to protect their eggs quite as vigorously as Whitespotted Greenlings. They appear to have a really long breeding season in our area.
My observations of egg guarding on NE Vancouver Island: October to March
Below, slideshow of courting
Red Irish Lord
Oh Red Irish Lords how I love thee. There is no better ambassador for how colourful life is in these waters since they are brilliant shades, yet astoundingly camouflaged. Red Irish Lords are often easier to find when guarding their eggs since these are less camouflaged. They most often egg guard with their heads positioned right atop the eggs, remaining absolutely motionless. It is commonly believed that the fathers guard the eggs but apparently it is more often the mothers but that the parents may take turns. Source: DeMartini and Sikkel 2006: ” Red Irish Lord exhibits primarily maternal and facultatively biparental guarding of the spawn.”
There are Buffalo Sculpin males guarding eggs at this time of year too but more mating appears to be happen in April and May. Usually, Buffalo Sculpins are even harder to spot than their Red Irish Lord cousins but the variably coloured, bright egg masses give away their location. They too have a strategy of staying right atop the eggs and remaining motionless when faced with annoying human divers.
Soon we will be participating in the Vancouver Aquarium’s annual Lingcod Egg Mass Count. Armed with an underwater slate, we will join divers along the Coast in helping determine the health of lingcod populations by looking at the number and size of the egg masses and if they are being guarded by males. And oh what fastidious fathers lingcod males are! The dedication to protecting the egg masses does vary from male to male but, generally, they do not leave their watch until the eggs hatch which can be more than 24 days. They could be guarding masses from multiple females separated by more than 7 m, and if laid by a female 5 years old and older, the egg masses can be the size of a watermelon and weigh up to 14 kg! That’s a lot to protect! (As is also the case for many rockfish, the older the female lingcod, the more eggs she lays). My best lingcod story is that I was marking down “unguarded” on my slate only to have it knocked out of my hands by the male that was very much guarding the egg mass I had been observing! Lots more info on this species at my blog item Lingcod – Fastidious Fanged Fathers.
My observations of egg guarding on NE Vancouver Island: January to April (Vancouver Aquarium’s Egg Mass Survey is from early February to the beginning of April).
Here’s a case where it is not just the male that guards the eggs. Mr. and Mrs. Wolf-Eel take turns wrapping their long tails around the large egg mass. I hope to one day have the opportunity to get a better image than this but, as a strategy for survival, the egg mass is often deep within the wolf eel couple’s den. Lots more information on this remarkable species at my previous blog item Wolf-Eel – No Ugly Fish!
I’ve only once been lucky enough to find a male of this huge sculpin species guarding eggs. They can apparently be very aggressive guarders but this very successful male (he was guarding the eggs of several females) was very tolerant of my presence. They have been documented to mate throughout the year. My one encounter with a male cabezon guarding eggs was in May.
In all these years of diving, I have yet to find a male Painted Greening guarding eggs so that I know for sure the eggs are from this species. Yet something else to be on the lookout for!
And, the stuff of dreams . . . to one day chance upon a male grunt sculpin while he is releasing the hatching eggs from . . . his mouth! For more on that, see my previous blog item Grunt Sculpin – Little Fish, BIG Attitude. The females apparently also do take on shifts in taking care of the eggs.
You need not be a diver to see the eggs of the following two species.
While carefully lifting up rocks in the intertidal during the Spring, you might
come across these egg masses and possibly even the male guarding them.
Scalyhead Sculpin
I have never seen scalyhead sculpin eggs while diving, likely because they are hidden away and because they are much smaller. The image of the eggs below was taken during a beach walk where students ensured they put the rock back as best they could to reduce the chances of the eggs drying out. Notice the different colours of the looney-sized egg masses? The eggs in this nest are from at least 4 females.
Very interesting in this species is that fertilization is internal.
My observations of egg guarding on NE Vancouver Island: Spring.
One study showed that the eggs hatched after 11 and 15 days. This study also documented courtship where the males rolled their heads in a circle and flared their orange branchiostegal membranes (on the underside of their throat) which apparently are only orange during mating season. Females were seen to have no response or to snap their heads horizontally in rapid succession, sometimes also quivering. During breeding season the males are also reported to have red-brown spots inside their mouth and a brown anal fin with small yellowish-white spots. (Source: Ragland, H., & Fischer, E. (1987). Internal Fertilization and Male Parental Care in the Scalyhead Sculpin, Artedius harringtoni.Copeia,1987(4), 1059-1062. doi:10.2307/1445578)
If you find an ice cream scoop mound like this, you have likely found the eggs of the black prickleback and the guarding male is likely very near. When taking students on beach walks, I emphasize the importance of not displacing animals by using this species as an example. Fish like the black prickleback are adapted to being able to wait out the tide in very little water and if the well-intentioned pick up the fish to put him in deeper water, they could be moving papa away from the eggs he was guarding.
That’s right, it’s mating season for buffalos . . . Buffalo SCULPINS that is!
Now that I’ve lured you to this posting with the procreation of a huge, shaggy terrestrial mammal on your mind . . . let me show you the spawn of this wondrous fish.
The Buffalo Sculpin – Enophrys bison – has earned the association with buffalo/bison due to the horn-like spine found on each gill plate (operculum). The species can be up to 37 cm long.
As is the case for many species in the sculpin family, male Buffalo Sculpins guard the eggs from predators. They also fan the fertilized eggs with their pectoral fins to aerate them and stop growth of algae / bacteria. Sometimes they guard the eggs laid by multiple females (see below for a male that appeared to be trying to guard EIGHT egg masses). When you consider that a female can lay between 19,000 and 32,000 eggs, the males have a lot of fertilizing and guarding work to do! Their guard duty lasts 5 to 6 weeks until the eggs hatch.
Many of the photos below show how you the males lie with their flat heads directly upon a cascade of eggs. The clusters of eggs laid in the spring allow me to find this incredibly camouflaged fish much more easily than I normally could. When I see a golden, orange or greenish shiny mass of eggs, I know a male Buffalo Sculpin has to be very near by. The bright colour of the eggs suggests that they might be toxic to many species, further protecting them from predation.
Very interestingly too, there is a species of fish known to parasitize on the care provided to the fertilized eggs by Buffalo Sculpins. Spinynose Sculpins (Asemichthys taylori) will lay their eggs on top of the Buffalo Sculpin eggs. The Spinynose Sculpin eggs will hatch faster and it is even possible that the presence of their eggs slows the development of the Buffalo Sculpin eggs. This “nesting parasitism”, is a “behavior previously unknown among marine fishes.” (Kent, Fisher, & Marliave, 2011).
As you can see, Buffalo Sculpins’ red, brown and pink colouration makes them very difficult to discern from the similarly brilliantly coloured life around them. They will remain absolutely still so as not to give away their presence. Their relative, the Red Irish Lord, has the same survival strategy. (See this previous blog item for photos and information on the Red Irish Lord.)
The camouflage, in addition to reducing the risk of predation by bigger fish and seals, allows the Buffalo Sculpin to be a very successful ambush hunter of shrimp, crabs, amphipods and small fish. It has been suggested that they eat mainly algae since this has so often been found in their gut but I am willing to bet that the algae ends up in their stomachs as a result of the Buffalo Sculpins grabbing prey ON the algae!
The Red Irish Lord (Hemilepidotus hemilepidotus; up to 51 cm) is a fish of incredibly stunning diversity of colour. Right down to its flecked, bulging eyes, this ambush predator is a master of camouflage.
The remarkable eyes of the Red Irish Lord. Note flecking on the lens. Photo: Hildering.
But how can you be camouflaged when you’re a fish of insane red and/or orange colouring? When you live in the rich, cold waters of the Northeast Pacific where Nature has doled out colour so liberally, you fade into the background even when so vibrantly coloured.
You can be camouflaged yet insanely coloured, if your world is colourful too. Photo: Hildering.
They are a favourite species for we underwater photographers since, as ambush hunters, they remain still even when annoying divers are flashing lights in their eyes or when a crab is sitting on their heads (see below).
What inspires me to now share a blog item on this sculpin species, is the awe I felt upon seeing the diversity in colour among the Red Irish on yesterday’s dive. We found four individuals among the pinks, reds, yellows and oranges of sponges, soft corals, hydroids and anemones and of course, we missed many more as they were too well-camouflaged!
I hope that your sense of wonder is also stimulated in realizing that the Red Irish Lords are able to change their colour, pattern and shading to match their surroundings!
Below, meet the four I saw on the day of writing this blog.
See too how Red Irish Lords are among the fish who guard their fertilized eggs in my blog at this link.
Red Irish Lord #1 – not so brightly coloured as the surroundings were also brown/green. Photo: Hildering
Red Irish Lord #2 – Bright surroundings = brightly coloured individual. Photo: Hildering.
Red Irish Lord #3 – hoping the crab inches down just a bit further so that s/he can feed (and that the annoying photographer would go away!). See too my blog “Crabs Making Bad Choices” for more photos of such interactions at this link. Photo: Hildering.
This was such a remarkable photo / learning opportunity but my camera was fogging up. Arg! Photo: Frustrated Hildering.
Red Irish Lord #4. Photo: Hildering.
Slide show below gives a further sense of the diversity of colour and camouflage in this species.
The Marine Detective 